Forum Discussion
Please help me find the signal
Hello, I have a Samsung 21u mobile phone, not here before the transport signal has been good, after a period of time I found that the signal changed, My phone I can not use the sim card, this is too sad, I do not know what is the problem, can you help me unlock it? My device imei is 356544764096084. I would be very grateful.
Are you a T-Mobile USA customer? Did you personally purchase the device directly from T-Mobile? Do you and your device meet all of the SIM Unlock Policy requirements that are required to qualify for a device SIM unlock?
SIM Unlock Policy | Unlock Your Mobile Wireless Device | T-Mobile
