HI!
I have purchased Samsung s8300 Ultatouch from 3 mobile Australia, i was using it in India, it was locked to a network.

I purchased a credit from FastGsm and unlocked it, it was working fine, when i downloaded some apps Opratingsystem crashed.

I took it to a local samsung service center, they reloded the indian version of operatingSystem in the phone, Now it will not connect to the local mobile network, servicecenter people say it’s due to version of OS we have in India, It connects to the network for a minute or so and later rejects the network. I tried using the unlock codes, no go all the locks are deactivated, but still the phone is not able to connect to the local network. I need your help to fix my phone.