If I reset my phone, does it stay carrier unlocked?

[Windows Central Question]

I'm currently looking at trying out the Windows 10 Mobile preview, and much of what I've read says that system resets are needed to make it useable. If I perform one, does my phone remain carrier unlocked?

I have a Lumia 1020, currently unlocked, but it is an AT&T model. Just want to be safe before I do it.

 

[pass11]

Having accidentally upgraded my unlocked att 1020 to a very early build of w10 mobile months ago. And then having to restore it to Wp8.1. I'll say yes, its fine to do so. My 1020 is my primary phone which I use on tmobile everyday.
Now I'm not saying do it. Especially with your primary phone. Cause if something does happen, you maybe out of luck. Also just because in my scenario it work that way, it may not for you.
I have a Roger unlocked 920 which I use to test the w10 mobile builds and it also works with my tmobile sim

 

[Tumultus]

If the device has been officially unlocked with an unlock code, the device will stay unlocked after a reset, even if you go back to WP8.1 afterwards.

 

[920Walker]

The APN info in Settings > Extra > Access point will revert back to AT&T. The APN info in Cellular SIM settings may also revert to factory settings. If on a different carrier than AT&T the SMS and Internet APN settings may need to be entered manually.

 

[Tumultus]

The APN info in Settings > Extra > Access point will revert back to AT&T. The APN info in Cellular SIM settings may also revert to factory settings. If on a different carrier than AT&T the SMS and Internet APN settings may need to be entered manually.

That actually depends on the SIM card / network provider. If the phone can find the APN settings, it will update automatically.

 

[920Walker]

That actually depends on the SIM card / network provider. If the phone can find the APN settings, it will update automatically.

It will not update Access Point.

 

[Tumultus]

It will not update Access Point.

Yes it will, depending on your SIM card. Switching phones from different carriers all the time between different networks.