A12 Sim not supported

[Tuhin Mahmud]

So my uncle bought an A12 from the USA, I inserted a Bangladeshi sim card and it was fine, but after an automatic patch update, I couldn't make phone calls or messages. I attached a snippet of the particular message.

[BandOfBrothers]

This maybe a region lock that's happened.

Usually inserting a local sim card from the region it's been released in but also being in that region and making a 5 minute call releases the lock.

However I appreciate it's worked before.

You may need to contact Samsung for support although as the phone's from a different region they may not be able to offer support.

I say this as that's the current situation in the UK where I am.

I imported a phone from Samsung Hong Kong into the Uk and Samsung UK wouldn't provide support for it.

I'm also not sure if a software update would lock out the phone.

Can you try another sim card in it and as a very last resort back up and factory reset.