As a hotselling Chinese smart phone, Goophone I5C has gained enough attention. But there are still some issues of this phone, such as IMEI, and no apple logo when turning on. Fortunately, both of them have been fixed already, here are the solutions.
NO Signal, IMEI issue, need to rewrite IMEI.
1, you must get one valid IMEI, which you can get from your old phones.
2, input “*#8002#”
3, select “GPRS”
4. delete exist IMEI number, input the new IMEI
5. click “Write IMEI” below the IMEI number, system will remind you “The IMEI is writen successfully”, done.
This solution also can be used for goophone 5s:





How to get Apple logo when turn on
1, input “*#8000#”
2, phone will restart, done


.
if you are tired with apple logo as welcome screen, you can let the phone back to goophone logo, just do the same.

Source