g7102 clone mt6575 network problem

i got the phone
its detect sim card
Connected to Phone.
CPU: MT6575 SW: E201 Ver: CB00
Downloading Boot8 …
EMMC Size: 0x00E9000000
Flash Type: EMMC
INT/EXT RAM Size: 0x0+0x0
Reading infr(EMMC)…
imei is ok for both sim card

but sn is strange 01234

but i cannot enter sim setting
also signal is full

how to repair