List of excluded operators/carriers
around the world that does not support call back services.

Country Carrier
Afganistan Etisalat-Emirates Tel
Algeria Djezzy
American Samoa Bluesky (via FT Hub)
Antigua APUA
Argentina Claro Argentina_ARGCM
Telefonica
Armenia Karabakh (ARMKT)
Aruba ABWDC Digicel Aruba
Armenia_Nagorno Karabakh
Australia Hutchison 3G
Optus
Vodafone
Azerbaijan Bakcell
Bahamas BTC
Bangladesh BGDTT Teletalk
Belgium WIS Telecom (Telecel)
Benin Etisalat
Libercom (via L2O Roaming Hub)
Telecel
Bhutan BTNBM B-Mobile
Bolivia Nuevatel PCS
Telecel (Tigo)
Bosnia Herzegovina Eronet
Botswana BeMobile (via L2O Roaming Hub)
Brazil Oi (BRABT BRATM)
British Virgin Islands Caribbean Cellular Telephone
Burkino Faso Telecel
Burundi Econet Leo
u-Com aka Telecel
Cambodia Beeline Sotelco
Cameroon Orange
Canada Rogers (CANRW or CANMC)
Telus
Videotron
Centrafrique (Central African Republic) Telecel
Chad Celtel
Milicom (via L2O Roaming Hub)
Chili Claro
Telefonica de Movil
China China Mobile
China Telecom
Colomia COLCO Tigo (Colombia Movil)
Congo (+242_COG) COGLB_MTN (Libertis)
Congo (+243_COD) Airtel aka Celtel
Costa Rica ICE
Telefonica
Cote Divoire aka Ivory Coast MTN -Loteny
Curacao UTS Setel
Czech Republic Telefonica 02 aka Eurotel Praha
Vodafone
Denmark Hi3G (DNKHU 238 06)
Egypt EGYAR Mobinil
El-Salvador SLVTP CTE Telecom Personal (Claro)
Ethiopia Ethio Teleocom
Faroe Islands Faroese Telecom
Fiji Digicel
Vodafone
France Free Mobile
Transatel
Gabon Airtel Zain (Celtel)
Libertis
Gambia Qcell
Germany Emnify
E-Plus
Ghana Airtel (Zain)
Gibraltar CTS (via L2O Roaming Hub)
Guam ITE
Pulse Mobile
Guatemala TELGUA (Claro)
Guinea Intercel
Guyana Digicel
GT&T
Haiti HTICL Comcel Haiti Voila
Honduras HNDME Claro Honduras Sercom Honduras)
Hong Kong China Motion HK (MVNO)
China Unicom HK (CHNCU)
Hungary Pannon GSM
Vodafone
Iceland Siminn aka Landssiminn ISLPS
Viking Wireless 
India BSNL
MTNL
Reliance Jio
Spice Telecom
Indonesia Aces
Bolt
Mobile-8
Satelindo
Smartfren
Iran MCI aka TCI
Iran-Kish Island TKC
Isreal Golan
Japan eMobile
KDDI (JPNKD)
Jordan JORXT Xpress
Kenya Safaricom
Zain
Korea KT Freetel
LG Uplus
Kuwait Wataniya
Laos VimpleCom
Latvia Bite
Lesotho Vodacom
Libya Al Madar Al Jadid Telecom
Liechtenstein Orage
Lithuania Bite
Macau C T M
Madagascar Airtel
TEMA
Malaysia Packet One
YTL
Mali Malitel
Orange aka Ikatel
Malta Vodafone
Mauritania ITE
Mauritel
Moldova Moldcell
Monaco Monaco Telecom
Morocco Medi Telecom
Myanmar MPT
Nauru Digicel Fiji
Netherlands O2 (Telfort)
New Caledonia O P T
New Zealand Vodafone
Nigeria Airtel aka Zain Celtel
Etisalat
M T N
Pakistan Mobilink
Palestine Jawwal
Papua New Guinea BeMobile
Paratuay CTI (Claro)
HOLA
Peru Telefonica
Philippines Digitel
Globe
Portugal Optimus 
Puerto Rico Claro
Reunion Orange
Romania Costmote aka Cosmorom
Rwanda TIGO Rwanda
Samoa BlueSky Samoa
Digicel Samoa
Saudi Arabia Mobily aka EtihadEtisalatCo
Senegal Sentel
Sri Lanka Hutchison Lanka
Sudan MTN
Suriname Digicel
Sweden Hi3G
Syria SYRO1 Syria Tel
Taiwan APT
KGT
VIBO, Taiwan
Tanzania Airtel
MIC
Togo Moov (via VF RH)
Trinidad & Tobago Digicel
TSTT
Tunisia TUNOR_Orange
Turkey AVEA TURIS TURAC
Turkmenistan Altyn Asyr MC (TM Cell)
MTS (previous BCTI)
UAE ARETH Thuraya (Satellite)
ARETC Etisalat
Uganda Smart (Suretelecom Uganda)
Zain (Celtel)
Ukraine Golden Telecom (not live)
U M C aka MTS UKRUM
United Kingdom Lycanmobile
Orange
USA Cincinnati Bell
Limitless
Sprint-Nextel
Tracy
Verizon Wireless
Venezuela VEND2 Digitel (ex-Infonet)
VENMS Telefonica Movistar Telcel
Vietnam G P C Vinaphone
GTEL Mobile
V M S Mobifone
Zambia Celtel Zamcell
Telecel
Zimbabwe Econet
Telecel
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