Will unlocked phone stay unlocked forever?

[Kahlo kahlow]

Hello,

I have an issue with my phone (LG G3) where the music keeps cutting whenever the screen is turned off. The music plays in the background but then it cuts and I have to open the screen, then it works but once I close it, it stops again, etc. It could be a firmware issue since I tried many methods to fix this issue so I want to know if resetting the phone will keep my phone unlocked to any carries. Also if I was to download a custom ROM or another Version of LG G3's official firmware via online and uploaded it to my phone, would it keep it unlocked too?

Thank you

 

[Barty1884]

An unlocked phone, is unlocked. Resetting it would simply reset back the firmware back to stock settings and should not impact the "unlocked" aspect.

Phones *can* be restricted via firmware, but they wouldn't be the distribution of an "official" LG firmware version, they would be carrier variants.
Even if you did end up with a restricted firmware, it wouldn't permanently "lock" your phone, it would just need a flash of firmware.