Micromax A27 - SIM Card Identification Failure

13
3.6 Fail to identify SIM card
Check if SIM card is inserted correctly
According to insertion direction
Failure to identify
SIM card
OK
Reinsert or change new
SIM card
No
Check
SIM connector for soldering
defect
No
Yes
Solder or replace SIM
connector
Check SIM circuit for fault Yes
Mark the mainboard
with analysis result
Replace new mainboard
No
No