How to re-lock a phone? Need to send it back

[matthew_b06]

So I have a fault Lumia 920 and need to send it back to Rogers, but I have it unlocked to use on Bell. How do I lock my phone again to Rogers? Does unlocking it Bell void the warranty and they won't replace it because it's faulty?

Thanks.

 

[rimlover]

i had a blackberry on rogers and got it unlocked. i doubt they would care. it's not illegal in canada. i think you should be fine.