Is my Nexus 4 blocked by O2?

[Anonymous]

In July 2013 I purchased a LGE960 Nexus 4 handset direct from the Google Play Store, SIM free.

I purchased a SIM from O2 and installed it in the phone.

Can anyone advise if, by putting this SIM into the handset, it has blocked my phone to the O2 network?

I wish to use the handset with another networks SIM and see no reason for O2 to block a handset that I own.

Maybe someone has experienced this problem in the past and I would appreciate your advice.

Thank you. Anthony.

[MI5]

No shouldn't do.
Sim free phones remain sim free always and no Nexus devices are network locked anyway.

[Bambino]

If the phone was bought unlocked and sim free there should be no block on it. Have you tried to put a sim from another network in the phone and had a problem, or is this just a query?

[Anonymous]

Just a question before I start changing the SIM. I did not wish to land up self blocking the device or worse. Thanks for the answers to date. Anthony.

[MI5 · Accepted solution]

Swap sim cards as much as you want - It'll be fine.

[Anonymous]

Thank you all. I shall do so with confidence. Anthony.