Failure To Identify Sim Card - Blu Dash 4.5 Service Manual

3.9 Failure to identify SIM card

SIM is not identified
Touch Pin is
clean?
Y
Change a new
SIM to try
N
Is SIM socket
good?
Y
Check if VSIM1/
VSIM2 are OK?
Y
Check each signal
on SIM is OK?
N
Clean SIM socket
Y
SIM is damaged.
Replace it
N
Change a new one.
N
Change U2
N
Hot U2r change a
new one