When you reset or reflash the device, the patching method will be wiped out from the device. So the IMEI that you wrote in, will not be working. So make sure that you do not do an update or reset. If you do, you have to run the methods again.
Yeah i dont speak about certificat. I speak about IMEI it restored when i reset the phone ... I found the original IMEI restored .and about certificat patch when i patched and finished the network run and stipe After 3 minutes when i type *#0011# IMEI certi failed