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What is the back end system of a SIM card?
The back-end system of a SIM card is likely to begin in a GSM network system. On one end their is an operator manned back-end system, and at the other is the SIM card.
Can you use a TracFone sim card in a boost phone?
No you cannot. AT&T uses a GSM network and Boost uses iDEN and the two are not even remotely compatible. The Boost SIM card can be used for international roaming but it will not work with GSM networks in the US. It will not work either way, a Boost SIM will not work in a GSM device and a GSM SIM will not work in a Boost device.
What does it mean if your phone says SIM Disabled-What should you do?
buy a new Sim card or consult a local mobile phone store
US Cellular SIM card transfer to Nokia Phone is it possible?
No
Will a Motorola i295 simcard with prepaid nextel service for radio only work in a boost Motorola i855e phone?
No, it will give an error message asking for the unlock code. Once you get that error, you screwed up the sim and it will not work in either phone again and it locks up your phone and it cannot be unlocked. Nextel does not have the unlock code, Motorola made the phones that way.
