Versão completa: Device locked or unlocked?
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I've recently purchased a second-hand Samsung Galaxy Tab S2 9.7 'unlocked' from O2, and am having problems getting a (non-O2) SIM card to work in it.

1.. I'm getting message 'SIM network blocked. Enter network PUK'. I put in the number supplied and I get 'Network unlock unsuccessful'
3. , When I go into Settings, Search Networks, it will only show O2-UK
4. On my start screen I also get message 'Invalid SIM card, network locked'
4. The above suggests the device is still locked to O2.

Thoughts, anyone?

Thank You!!!

I didn't find the right solution from the Internet.

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