Turkey

SOCAR takes over Millenicom
Turkcell delivers SD-WAN with Versa Networks, Odine Solutions
Turk Telekom claims first with 400Gbps Ethernet
Turk Telekom EBITDA jumps 34.7% in 1Q19
Turkcell 1Q19 revenues boosted by 19.2% year-on-year
Comptroller investigating Turk Telekom
Turkcell 2018 annual sales jump 20.8% on digital services strategy
Regulator permits 5G trials in Ankara, Istanbul, Izmir
Turkcell and Affirmed complete virtualised network deployment
Turk Telekom 2018 revenues climb 12.6%, but swings to USD267m annual loss on FX
Turkcell, Ericsson claim Turkey’s ‘first live 5G test’
Turk Telekom to borrow USD500m
BTK launches Turkish 5G open lab
IoT Time: M2M/Internet of Things weekly digest
Turk Telekom Q3 revenues jump 19%; 44% of mobile users now on LTE
Turkcell, Samsung claim Turkey’s first ‘live 5G trial’
IoT Time: M2M/Internet of Things weekly digest
Turkcell EBITDA margin climbs to 41.3% in Q3
China’s Tatwah rumoured as suitor for Turk Telekom
Turkcell signs technology development deal with Nokia
Govt grants final approval for Turk Telekom transfer
Turk Telekom ownership transfer to banks approved by telecoms regulator
Turkcell revenues boosted 18.3% in Q2
Turk Telekom’s Q2 revenues jump 10%
Banks apply to comptroller for Turk Telekom takeover
Banks poised to take over Turk Telekom next month
Turkcell deploying Ericsson Radio Dot for indoor gigabit connectivity
Turkcell brings LTE to rural Anatolia under Universal programme
Turk Telekom boosts Q1 sales, EBITDA by 8.8%, 29.1%
Turkcell reports best ever quarterly EBITDA
Turkcell’s annual revenues, net profits leap 23.4%, 32.6%
Turkcell, Samsung collaborate on 5G acceleration
Turk Telekom achieves 12.6% annual turnover boost
IoT Time: M2M/Internet of Things weekly digest
Banks agree Turk Telekom parent takeover, report says
Vodafone, Huawei complete world-first trial of GSM/LTE 900MHz dynamic spectrum sharing
Turk Telekom considering future public listing for subsidiaries
Ooredoo, STC reportedly rival bidders for Turk Telekom parent
Oger nearing sale of Turk Telekom stake
Turkcell revenues jump 25.7% in Q3
Vodafone Turkey tests 3.5GHz spectrum, on the path to 5G
IoT Time: M2M/Internet of Things weekly digest
MVNO Monday: a guide to the week’s virtual operator developments
Turkcell launches entirely internet-based Lifecell mobile packages
Telia sells further 7% of Turkcell; no longer holds direct stake
IoT Time: M2M/Internet of Things weekly digest
Turkcell’s revenue, net profit up 28.5%, 69.2% in Q2
Vodafone Turkey tests 700MHz LTE with eye on 5G
Turkcell, Huawei claim first 5G mmWave test, hitting speeds of 70Gbps
Turkcell tests Massive MIMO on live network in preparation for 5G
Vodafone Turkey highlights USD283m investment plan
Avea, Vodafone to jointly cover 1,472 unserved locations
Turkcell selects Verscom's ODINE to optimise wholesale voice
Telia selling part of Turkcell stake
Turkcell posts near-flat quarter-on-quarter group revenues
Vodafone Turkey, Huawei claim 'world exclusive' GSM/LTE spectrum sharing solution
Midweek M2M: IoT and machine-to-machine developments
Turkcell enters strategic cooperation with ZTE
Vodafone Turkey addresses indoor/small cell coverage with NEC, SpiderCloud
Turk Telekom opens 5G development centre
Turkcell’s annual group revenues climb 11.9%
Vodafone Turkey, Huawei, Qualcomm announce world’s first LAA-ready network
Turk Telekom swings to USD194m annual loss on currency drop
Turkish cellcos collaborate with state defence firm on 4.5G base station development
STC revenues up 2.4% in 2016; SAR600m loan offered to Oger’s Turkish unit
Turkcell, Ericsson achieve 24.7Gbps in 5G test
Argela implements RAN slicing over Turk Telekom’s LTE-A network
Cable Compendium: a guide to the week’s submarine and terrestrial developments
Stalemate again in Alfa/Cukurova Turkcell ownership
Russian tycoon Fridman poised to boost Turkcell stake?
VTB, Alfa ‘agree joint investment’ in Turkcell
Turkcell boosts Q3 revenues by 8.8%; selects Ericsson as long term managed services partner
Tower Talk: a guide to the latest major cell site developments
STC mulling an option to raise stake in Oger Telecom
Tower Talk: a guide to the latest major cell site developments
Vodafone Turkey runs '5G' 10Gbps radio link tests
Turkcell freed from retail mobile minimum price regulation
Turkish internet content authority TIB scrapped, merged into telecoms regulator
L1 wins Turkcell arbitration proceedings against Cukurova
Turkcell reveals joint venture plans for fibre broadband
Turkcell posts group revenue growth of 8.6% in Q2 2016
Turkcell eyes Balkans, Middle East expansion as domestic growth slows
Turkcell, Ericsson demo LTE Broadcast for live HD mobile video concurrency
Tower Talk: a guide to the week’s major cell site developments
MVNO Monday Q&A — Fenercell
Turkcell negotiates acquisition of 100% IsNet shares
Turkcell reports record high first quarter revenue, EBITDA
Turk Telekom, Nokia ink 5G, IoT MoU
Alfa willing to sell Turkcell stake for USD2.7bn
Turkcell to launch ‘4.5G’ in 81 cities, ten days ahead of schedule
Conflict brewing over access to Turk Telekom’s fibre
BVI court rules in TeliaSonera's favour in Turkcell ownership dispute
Turkcell to submit binding bid for TeliaSonera’s Fintur stake
Turk Telekom to introduce ‘5G-like’ technology via KT Corp deal
Turkcell posts revenue of TRY12.8bn for FY15, up 6% y-o-y
Turk Telekom to invest USD3.4m over next three years
Turkcell moving forward with Fintur acquisition
Vodafone Turkey achieves record 942Mbps in '4.5G' speed tests
Turk Telekom brand now encompasses Avea, TTNet operations
Turkcell demos ‘4.5G’ speeds ahead of April launch
Turkcell looking to bid for TeliaSonera’s Fintur stake
Turkcell CTO details 4G strategy
Domestic unit drives 6.4% rise in Turkcell Group revenue
Turkcell taps NEC for microwave system; LTE network to launch on 1 April 2016
Turkcell considers full acquisition of Fintur
Alfa Group applies for indirect control of Turkcell
Turkish 4G auction attracts keen bidding from Vodafone, Avea and Turkcell; Netgsm fails to bid
Turk Telekom completes Avea buyout
Turkcell, Huawei sign MoU on 5G cooperation
BTK revises tender specifications; auction has not been cancelled
Turkcell reports best ever Q2 revenue, EBITDA, net income
Turkcell, Ericsson sign 5G MoU, preparing for near-future adoption
Turkcell, Aselsan sign 5G technology framework deal
Turkey postpones 4G auction until 26 August 2015
TTI, NTT Com partner to deliver wholesale IP transit service
Turk Telekom 1Q15 revenue up 6.6%; bottom line hit hard by TRY depreciation
Turkcell posts record high Q1 revenue of USD1.1bn
Turk Telekom confirms 100% ownership of Avea; pays USD329m for 10% stake
Turkcell chooses TSIC for 4G roaming in 29 countries
Turk Telekom seeks 100% Avea ownership
Turkcell completes VoLTE test, claims first in Turkey
Turkish operators test domestic 4G base station
BTK sets date for 4G frequency auction, confirms licence terms
Vodafone, Turkcell claim 450Mbps speeds in tri-band CA tests
BTK sets EUR2.3bn floor price for frequency auction
Alfa Group offers USD2.8bn for 13.76% Turkcell stake
Turkey staging 4G tender in May; 2600MHz licence to be offered to 4th player
Turkcell FY14 revenue increases 5.6% to TRY12.0bn; net income plummets 19.8%
Turk Telekom 2014 revenues increase 3.7% y-o-y to USD5.5bn
Superonline, Telekom Austria partner to improve international connectivity
Turkcell confirms 3C-HSDPA integration in 81 cities; cellco plots 2015 LTE launch
Turkcell CEO anticipates 'early 2015' LTE launch
Superonline awards IPTV contract to Amino
Turk Telekom 3Q14 revenues up 4.4% y-o-y to TRY3.5bn
Turkcell group revenues climb 6% in Q3
Turkish delight for Virgin after EUR10m investment boost
Cukurova could recover Turkcell stake by 31 July
Turk Telekom taps Alca-Lu to overhaul core IP network
Turk Telekom 2Q14 revenue drops 1.3% to TRY3.3bn
Turkcell teams with Ericsson, Qualcomm for 3C-HSDPA trial
Turk Telekom 1Q14 revenues up 1.6%; net income slumps 27.1%
Turkcell 1Q14 revenues up 6% to TRY2.86bn
Court dismisses Avea’s lawsuits against Turkcell
Turkcell FY13 revenues increase 8.6% y-o-y to TRY11.4bn
Cukurova secures extension to reclaim Turkcell stake
Turk Telekom FY13 revenues reach TRY13.19bn
Superonline acquires Metronet for TRY29m
MTN Group declares ‘no legal merit’ to Turkcell’s latest legal challenge
Turk Telekom inks loan deals totalling USD438m
Turkcell 3Q13 revenue rises 8.3% to TRY2.98bn
Turk Telekom 3Q13 revenues increase 4.8% to TRY3.4bn
Turkcell anticipates big business from M2M sector
Delayed Turkcell results distract from boardroom chaos
Capital Markets Board wades into Turkcell dispute by appointing two new board members
Turkish delight? Turkcell unveils 900Mbps transmission speeds in LTE-A trial
Privy Council grants Cukurova open-ended extension to pay Altimo
Turk Telekom lodges USD530m bid for 53% stake in DigiTurk
Turkcell results delayed due to ‘lack of board members’
Turk Telekom 2Q13 revenues reach TRY3.4bn
Cukurova seeks Turkcell payment extension
Privy Council slaps USD1.56bn price-tag on Turkcell stake
Local telcos jostle for control of DigiTurk
Turkcell 1Q13 revenues up 13% to TRY2.7bn
Turk Telekom 1Q13 revenues increase 6.2%
Turkish government inks 4G deal
Turk Telekom seeks to sell off unwanted copper cables
Regulator appoints trio of independents to Turkcell board
Superonline snags Deksarnet Telekomunikasyon for USD1.75m
Vodafone snags EUR100m EIB loan for Romania, Turkey
GBI confirms launch of inaugural Gulf-to-Europe terrestrial fibre link through Iraq, Turkey
Turkcell’s group revenues up 12%; Astelit’s sales climb 10%
Turkcell signs universal service contract for rural mobile coverage
Ukraine, Bulgaria, Georgia joining TASIM fibre superhighway
Going postal? PTT enters mobile market as PTTcell
Turk Telekom sees 2012 revenues increase 6.4% to TRY12.7bn
Cukurova seeks USD2bn loan to recover Turkcell stake
UK’s Privy Council sides with Altimo in Turkcell tug-of-war
A royal mess? Turkcell dispute goes down to the wire as Privy Council wades in
Turk Telekom signs USD600m loan with CDB, agrees additional terms with EDC
Turk Telekom 6.68% stake sale planned for Feb-13
TT taps Alca-Lu for VDSL2 rollout
Turkcell 3Q12 revenue up 8.9% y-o-y
Turk Telekom posts third quarter results
Superonline removes international internet boundaries
Turk Telekom considers public offering of 15% stake
MVNO probes Turkish Virgin tie-up
Turkish anti-trust board confirms Turk Telekom, TTNET probe
Turkcell 2Q12 revenues up 12.5% to TRY2.565bn
Turk Telekom 2Q12 revenues increase 7.2%
EBRD grants Turk Telekom EUR100m loan to boost broadband in Eastern regions
Turkcell 1Q12 net profit increases 56% thanks to overseas growth
Turk Telekom seeks to explore ‘different vertical markets’
Turk Telekom 1Q12 net profit rises to TRY772m
Turkcell confirms 100Mbps ‘on the go’ in LTE trial
Turkcell frees seized Cukurova assets after unspecified payment
Turkcell saga has another twist in the tail; British Privy Council quash costly Caribbean ruling
Turkcell FY2011 revenues rise 4.1% to TRY9.37bn; net income plummets 33%
Altimo to seize Cukurova stake in Turkcell unless debt is paid by March
Turk Telekom’s revenues climb 10%, helped by 16% rise at Avea
Turkcell extends loan guarantee to Financell after Astelit default
Qatar makes direct approach for Oger Telecom
Turkcell records highest quarterly revenue to date
Turk Telekom Q3 revenues grow 13.3% to TRY3bn
Turk Telekom deploys submarine cable to Northern Cyprus
ICTA exempts FTTH from ‘market analysis’ for five years
Cukurova ordered to pay USD932 million damages to TeliaSonera
Turkcell snaps up corporate ISP Global Iletisim
Koc Holding releases grip on telecoms unit
Altimo acquires additional 14% stake in Turkcell
Turk Telekom H1 revenues reach USD3.5bn
Watchdog fines Turkcell TRY91.94 million for abusing market dominance
MedNautilus extended to Istanbul
Turkcell’s Superonline unit launches 1Gbps broadband
Turk Telekom reports 11.7% rise in Q1 revenues
Seven ISPs team up to launch ‘TNAP’ internet exchange point
Cukurova attempts to derail Zain, Etisalat deal with late bid
Turk Telekom upgrades VDSL2 speeds to 100Mbps, ADSL2+ speeds to 16Mbps
Russian anti-trust agency blocks Telia, Alfa merger of MegaFon, Turkcell stakes
Middle Eastern telcos collaborate for Regional Cable Network project
Turkcell to introduce Dual Carrier technology; 3G speeds set to double
Turkcell Q3 profit up on falling revenues
Turk Telekom reports nine-month revenues of TRY7.96 billion
Privatisation on the cards for Turkish Cypriot telecoms
Regulator approves Turk Telekom, Invitel deal
Turk Telekom fined USD230 million for ‘tax irregularities’
New avenue of Ukrainian anti-monopoly investigation centres on Alfa’s Turkcell/Astelit stakes
Turkcell proposes automatic 3G subscription for compatible users
Turkcell announces 8.5% net income increase for Q2
Turk Telekom announces H1 2010 net income increase
Turk Telecom awards fixed network equipment to ZTE
Court rejects Alfa case against Cukurova; Russian firm says it will appeal
Turkcell tests LTE with Cisco
Turk Telekom acquires 100% of Invitel
Turkcell profit dips on weak currency
Turk Telekom 1Q net profit up 88%
TURKSAT poised to sign two new satellite contracts
Anti-trust authority gives green light to Vodafone’s purchase of Borusan
Turkcell expands 3G network
Turkcell claims 42Mbps 3G speeds
Turkcell: net profit down 45.3% in 4Q09
Turkcell signs up five million 3G subs in six months
Oger prepared to pay 20% over asking price for TT
Turk Telekom: Broadband growth drives net profit
Minister hints at Turk Telekom sale in 2010
Vodafone agrees deal to acquire Borusan
Vodafone Turkey negotiating takeover of fixed telco Borusan
Sparkle extends its IP backbone into Istanbul and Bucharest
Usmanov threatens to derail MegaFon-Turkcell merger
Borusan Telekom selects vendors for VoIP rollout
TeliaSonera and Alfa Group agree to merge holdings
Turk Telekom: Rural Transformation Project completed
TeliaSonera to increase Turkcell stake
Turkcell: net profit down 42.4%
3G launches in Turkey
Turkcell, Turk Telekom in favour of sharing infrastructure
Turkcell contracts Alca-Lu for 3G upgrade
Turk Telecom post 20% drop in net income
Turkcell revenues down 18.5%
Turk Telekom posts 27% drop in net income
Avea attracts a million through MNP
Turkey’s interconnection rates lowered
Avea awards three 3G contracts
Alfa Group reduces Turkcell stake
Ericsson wins in Turkey
Avea sues Turkcell
Vodafone unveils Turkish investment plans
Strong sales and customer growth at Avea
TTNet announces TV plans
Turkcell seeks USD750m loan
Turkcell 2008 results
Turk Telekom 2008 results
Turkcell to launch 3G in June
Phone sales hit by economic crisis
Turkcell survives MNP
Turk Telekom ready and willing to buy, Avea gains from MNP
TT reports half a million fixed line losses
Turk Telekom confirms wireline investments
Vodafone Turkey chooses Huawei for 3G
Turkcell wins ‘A’ band 3G licence; Vodafone and Avea also licensed
Three for 3G
Internet tax cuts
Turk Telekom says it will appeal fine
Sales up at Turk Telekom
Turk Telekom maintaining investments in 2009
50,000 porting requests on first day of MNP
Turkey gets MNP at last
USD600m investment in 2G mobile
Turkcell Q3 net profit up 50.5%
Turkcell expands its range of secure mobile services
Avea to launch video ringtones
Avea predicts boost from MNP
Valimo touts mobile security system
Turkish delight at SIP from Nortel’s technology cup
3G auction expected in December
Borusan Telekom upgrades with Redback
New 3G auction within six months
Avea completes MNP set-up
Turksat plans two new satellites by 2014
Avea confirms it will bid for 3G licence
Turk Telecom 2Q results
Turkey to license MVNOs sooner rather than later
Turkcell: 2Q net income jumps 56%
Turkcell expands IM offering
Avea ready for 3G
Minister heralds 3G auction in November, after MNP
Turk Telekom reports 13% sales growth
Alca-Lu and Turk Telekom sign new optical supply deal
Turk Telekom IPO raises USD1.9bn
MNP for Turkey
Turkcell results for Q1
Number portability coming soon
Alfa continues legal battle to claim Turkcell shares
Turk Telekom valued at USD12.85bn ahead of IPO
TeliaSonera considers sweeping up more Turkcell crumbs
Turkcell still in for Syriatel
Turkcell plans bid for BeST
Turk Telekom to sue cellular rival
IPO could be delayed by market conditions
Zain interested in Turkish 3G licence
Avea expects MNP in October
Turkey preparing for telco sale
TeliaSonera wins Turkcell arbitration ruling
TURKSAT 3A ready for launch
Turkcell profit up 54%
Avea messaging going Live
Turk Telekom to invest USD50m in sales network
Avea installs Telenity’s SMSC
Avea hits ten million subs
MNP expected by year-end
Indian group buys Turkish alternative telco
Turkey expects USD2bn from Telekom IPO
Turkcell fails to halt mobile number portability
Altimo selling half of Turkcell stake cheaply; Altimo-Telenor progress allows Kyivstar to release financials
Alfa extends olive branch to Telenor in Ukrainian dispute
Government plans Turk Telekom IPO
Turksat prepares new platform
Cukurova claims Turkcell win
Turkcell profits up 29% on 44% sales hike
Avea chooses Alca-Lu for IP/MPLS-based network
Turk Telekom picks Juniper
Romania, Slovenia to join Oger’s club?
Turkcell’s 3G licence award suspended
Regulator to nullify Turkcell’s 3G award, says ministry man
Turkcell wins as rivals chicken out of Turkey 3G auction
Orange to bid for Turkish UMTS licence
No IPO for Avea until 2009
Avea launches mobile TV
Turkcell sees 29% profits jump
Avea launches EDGE TV
Turkcell grows in second quarter
Cukurova offloads part of Turkcell stake
Turk Telekom reveals network plans
3G auction postponed
Cukurova repays Altimo debt
Avea ready for MNP
Turkcell posts 45% profit increase
Cukurova says it will repay debt to Alfa
Avea gets USD1.6 billion loan
Motorola settles Telsim lawsuit
Turkey announces tender for four 3G concessions
Avea takes number portability issue to the courts
Turkcell wants MNP halted
Turkcell and Vodafone expand
Turkcell confident of 3G success
Customer rise helps Turkcell
Watchdog wants Alfa offer
Turkey to offer four 3G licences
TeliaSonera talking Turkey in Russia
Avea reaches 8m subs
Turk Telecom predicts sales rise
TeliaSonera gets Turkcell victory
Avea looking at USD1.5bn loan
Turkcell reports 14% annual subs growth
Telsim, Turkcell confirm financial plans
New year, new tariffs
Motorola gets pre-Christmas Turkey
Vodafone raises Telsim outlook
Avea selects WFI
Turkcell selects Mobixell
Cukurova to reduce Turkcell stake
I want my MTV
Avea goes with Nokia
Turkcell passes 30 million mark
New portal for Turkcell
Repeater contract for Unity
Profit falls at Turkcell
TI offloads Avea
Turkcell still growing
Turbonet trials WiMAX
TeliaSonera studying Turkey, Russia moves
Ericsson expands Avea
Vodafone completes Telsim purchase
NEC wins Turkish DSL deal
Strong quarter for Turkcell
Turkcell pleased with growth
Oger eyes Telecom Italia’s Avea stake
Oger to pay TT balance in 2006
Turkcell reports 2005 results
Telsim takeover approved
Turkcell base up 19%
Intracom claims right to buy 10% of Telsim from Vodafone
Vodafone bags Christmas Turkey
Telsim auction to be televised live
Nine enter race for Telsim
TeliaSonera initiates legal action against Russian Alfa Group
MTS takes Sistema’s place in Telsim bid
Turkcell adds 1.3 million net new customers in 3Q 2005
Oger inks Turk Telekom deal
Turk Telekom 3Q results
Motorola settles Telsim suit
State approves TT sale to Oger
Turkcell reports 3Q performance
FT talks Turkey (and Tunisia)
15 apply for Telsim tender
Avea contracts Ericsson for GSM network expansion
Alfa to take 27% stake in Turkcell?
Telsim and Motorola reach verbal agreement over debt
Sistema announce intentions for Telsim bid
Turkcell adds 1.3 million customers to take base to 25.6 million
Government mulls Turk Telekom IPO date
Telsim to sue Turkcell
Nokia settles Telsim case
Government presses ahead with Telsim sale
TeliaSonera launches new suit against Cukurova
Motorola continues pursuit of lost Telsim billions
Telsim sale delayed by fraud case
Long-distance telcos look for change in regime
Government approves TT sale
Alfa looking for partners to become global mobile powerhouse; Scandinavian operators need not apply
Saudi/Italian JV wins TT stake with USD6.55 billion bid
Alfa agrees USD3.3 billion financing package for Turkcell
MTN to replace Turkcell in Irancell
Bid deadline approaches for Turk Telekom sell-off
Turkcell adds 900,000 new customers in 1Q
TeliaSonera asks Cukurova to comply
Telecom Italia and Koc Holding discuss Turk Telecom acquisition
Motorola scores another win against Uzan family
Etisalat linked to bid for 55% stake in Turk Telecom
Turkey served with Blackberries
Turk Telekom privatisation deadline postponed to end of June?
EUR120 million bid for Albetelecom
Telefonica won’t talk Turkey
Turkcell posts strong 2004 results
Alfa to outbid TeliaSonera for Turkcell stake?
TeliaSonera gains majority ownership of Turkcell
Turkcell launches EDGE
Alcatel to supply 600,000 DSL lines
Ericsson talks Turkey
TT sell off piques telcos interest
Major interest in imminent Turk Telekom sale
Push-to-talk debuts in Turkey
US Court of Appeal upholds ruling against the Uzan family
TeliaSonera’s Turkcell hopes dashed
TIM announces doubling of Brazilian investments
IsTIM/Aycell merger completed
Government seizes assets from the Uzan family
Turkcell releases 2003 operating stats
Turkcell board member arrested
TeliaSonera to bid for Turkcell to end long-running row
TeliaSonera/Turkcell debate continues
Aria-Aycell merger approved
Government plans 51% Turk Telecom stake sale
TeliaSonera ‘wins’ first round of Turkcell fight
Battle for control of Turkcell hots up
TeliaSonera squares up to Cukurova
New funding for Turkcell
Turkcell moves to dilute TeliaSonera stake
Turkcell to enter race for Iraq licences
Uzans emerge from hiding to rebut police charges
Arrest warrant out for Hakan Uzan
Turkcell continues to show rivals a clean pair of heels
Uzans resign and refuse to pay Telsim fine
Telsim 2, Motorola 1: Turkey crys foul
Telsim 2, Motorola 1: Turkey crys foul
Siemens wins EUR23 million Aycell deal
Telsim 2, Motorola 0
Telsim 2, Motorola 0
Uzan’s Swiss bank accounts frozen
Gloves off in Motorola .vs. Telsim spat
Gloves off in Motorola .vs. Telsim spat
Mobile players to join forces
Advent may lodge complaint over Koc Holding
Advent may lodge complaint over Koc Holding
Turkcell returns to profit and predicts modest gains for 2003
TeliaSonera to quit TurkCell