Change iphone imei no.
IMEI (International Mobile Equipment Identity) number is a Unique Number Allocated to Every Mobile Handset in the world regardless of its price , features or Size. GSM network uses IMEI number to identify Valid devices in the world and uses that unique number to Stop a stolen mobile phone from accessing the Network after the real owner complains about the Theft. For example, when a mobile phone gets stolen, the owner can and should call their network provider to blacklist the phone using its IMEI number. In this Way that network and Sometimes all networks considers that handset as useless and no network can be used on that handset even after SIM (Subscriber identity module) is Changed.