Does the CelTrek SIM card work in every mobile phone?
A – The CelTrek SIM card works in most of the current GSM handsets, as long as it is unlocked and supporting Java programming. Some cellular phone models may require you to take extra steps when trying to make a call, by utilizing the menu option to make a cell. CelTrek also offers a full package, including Phone and SIM (unlock quad band). For more details click here.