Network Covrage
| Country | Network |
|---|---|
| Trinidad and Tobago (+1868) | Digicel Telcom Services (TSTT) |
| Tunisia (+216) | Tunisiana (Osracom) Tunisie Telecom (Tunicell,Tuntel) |
| Turkey (+90) | Avea Turkcell Vodafone (Telsim) |
| Turkmenistan (+993) | BCTI |
| Turks and Caicos Islands (+1649) | Cable & Wireless Digicel IslandCom |
| Uganda (+256) | CelTel (Zain) MTN Uganda Telecom (UTL Telecel) Warid Telecom |
| UK (+44) | BT (PSTN) Hutchison 3G UK Ltd O2 (BT Cellnet) Orange T-Mobile Vodafone |
| Ukraine (+380) | Astelit (Life :) BeeLine (URS, VimpelCom) Golden Telecom (VimpelCom) Kyivstar GSM MTS (Ukranian Mobile Communications) Ukraine Telecom (Utel) |
| United Arab Emirates (+971) | DU (EITC) Etisalat |
| Uruguay (+598) | Abiatar (Movistar) America Movil Wireless (CTI) Ancel |