SIM not valid

[tony9929]

I have a 3650 witch I used with T mobile in USA, now back home in Sri Lanka I want to use my phone with a local pre paid network.when I insert a sim card the message "SIM not valid" display. does that mean my phone needs unlocking? if so please send me my unlock code.
IMEI no.351102503929639 thanks.

[gsm community]

I have a 3650 witch I used with T mobile in USA, now back home in Sri Lanka I want to use my phone with a local pre paid network.when I insert a sim card the message "SIM not valid" display. does that mean my phone needs unlocking? if so please send me my unlock code.
IMEI no.351102503929639 thanks.

#pw+144364677205463+1#

[crashynot]

Take care if you fone aint tri band ( GSM 900/1800/1900)
it will not work in your home town (Sri Lanka )
check you fone Details or fone Manual !!

[tony9929]

thanks a lot!!!!!!!!! it worked , tony.