At least you're showing some kind compassion, thanksI had this issue with original oos v2. That was the reason I switched to cm. And I also had Vodafone. Then I went to T-Mobile and all started working....
Sorry I don't know how to help :-|
Sent from my OnePlus X using XDA Labs
And did you have the same issue with CM? You didn't say. I'm quite confident it's related to how my carrier handles two different sets of antennas that makes the bands firmware kinda fail... If only I had the tools to diagnose that and propose a fix...
The only weird thing about that is the fact that the issue wasn't happening before... I guess it follows up with the latest CM update, so... something has probably be introduced that breaks the antenna switch in a random way.
For your info, my carrier (Free Mobile, France) is relatively new, so it's using both its antennas (mainly 4G ones) and another provider's antennas (H only), which are seen as "Free" antennas when looking through available networks, so that it's not considered as roaming for the phone.