Tata Indicom is the first telecommunication service provider in the country to introduce the unique experience of international roaming with a Tata Indicom One World One Number T-SIM card; a single T-SIM card that empowers you to switch between CDMA & GSM networks without having to use different SIM cards. Tata Teleservices Ltd. has a roaming tie-up with CDMA & GSM networks across more than 178 countries. Now the world is no longer CDMA or GSM but one world where you get to choose the best service provider without having to worry about CDMA or GSM.
Welcome to the world of truly international roaming with Tata Indicom "One World One Number".
PRL 7 download required for Non T-SIM handsets. Please Call 121 for details.
For those using Motorola A840 (World Phone) while roaming in on CDMA network you need to do the following:
| Sr No | BRAND / MANUFACTURER | MODEL | TYPE |
| 1 | Kyocera | Blade | Non-TSIM |
| 2 | Kyocera | K7 Non Brew | Non-TSIM |
| 3 | Kyocera | KX144 PTT | Non-TSIM |
| 4 | Kyocera | Phantom | Non-TSIM |
| 5 | Kyocera | Prisma KX17 | Non-TSIM |
| 6 | Kyocera | Rave | Non-TSIM |
| 7 | Kyocera | Topaz KX7 | Non-TSIM |
| 8 | LG | AD2535 | Non-TSIM |
| 9 | LG | AD5235 | Non-TSIM |
| 10 | LG | AD6335 | Non-TSIM |
| 11 | Motorola | A840 | Non-TSIM |
| 12 | Motorola | V3C | Non-TSIM |
| 13 | Nokia | 3105 | Non-TSIM |
| 14 | Nokia | 3205 | Non-TSIM |
| 15 | Nokia | 3585 | Non-TSIM |
| 16 | Nokia | 3586 | Non-TSIM |
| 17 | Nokia | 6225 | Non-TSIM |
| 18 | Nokia | 6585 | Non-TSIM |
| 19 | Pantech | Slider PA715SC | Non-TSIM |
| 20 | Samsung | SCHN500 (Neo) | Non-TSIM |
| 21 | Haier | C1000 | T-SIM enabled |
| 22 | Haier | D1000 | T-SIM enabled |
| 23 | Haier | D1200 | T-SIM enabled |
| 24 | Haier | T1100 | T-SIM enabled |
| 25 | Huawei | C-218 | T-SIM enabled |
| 26 | Huawei | C506 | T-SIM enabled |
| 27 | Kyocera | K112 | T-SIM enabled |
| 28 | Motorola | C131 | T-SIM enabled |
| 29 | Nokia | 1255 | T-SIM enabled |
| 30 | Nokia | 2112 | T-SIM enabled |
| 31 | Nokia | 2255 | T-SIM enabled |
| 32 | Nokia | 2280 | T-SIM enabled |
| 33 | Nokia | 2355 | T-SIM enabled |
| 34 | Nokia | 3125 | T-SIM enabled |
| 35 | Nokia | 3155 | T-SIM enabled |
| 36 | Nokia | 6155 | T-SIM enabled |
| 37 | Nokia | 6235 | T-SIM enabled |
| 38 | Nokia | 6255 | T-SIM enabled |
| 39 | Nokia | 6265 | T-SIM enabled |
| 40 | Pantech | PA711 | T-SIM enabled |
| 41 | Samsung | SCHE159 (Wideo) | T-SIM enabled |
| 42 | Samsung | SCHN109 (Bullet) | T-SIM enabled |
| 43 | ZTE | C150 | T-SIM enabled |
| 44 | ZTE | C220 | T-SIM enabled |
Whenever you are traveling abroad you can access the Tata Indicom 24 x 7 Customer care by dialing 9225510000 in case of any problems faced in the international locations or for any queries pertaining to International Roaming.
Dial : +919225510000. Standard call charges will be applicable