A few hours ago (about 10pm UK time) my GS2 suddenly lost all signal. I tried going into Settings > Wireless and Network > Mobile Networks but I just got the message "Insert SIM card to access network services".
I am with Three UK and have tried both my SIM cards, but neither work. They will work in another phone though.
I tried resetting it but that's made no difference, and now I wish I hadn't done it as I've just noticed that half my contacts are lost! They aren't showing up in my gmail account for some reason. It used to sync them automatically.
There's definitely a problem with the phone itself anyway. When I try to access the IMEI by dialing *#06# it comes up blank, and under Settings > About Phone > Status many things come up as "Unknown".
Is there anything I can do? I can't think what brought it on. The only thing I've changed on the phone recently is update the firmware, and that was an official version, and several days ago anyway.
Thank you. the problem is that efc files is misssing or damaged, the solution is as follow :
* find the modem file of ur exact firmware.
* be sure that there is a defference between I9100 and I9100G, so determin what firmware is already installed in ur device.
*use odin to istall the modem file.
*how to install as follow ( open odin, on phone bar add modem file , make sure re-partition is not marked, prepare ur device to download mode by pressing together volume dwn , power, ok. after that it will ask u to insure ur option to dowload press up volume key to continue , attach the device to pc the bar of COM3 will flash yellow color, then press start to initiate, after finishing detach the device and make deep rooting by pressing up volume , power and ok key together and stimulately. and perform re-rooting. problem solved
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