The problem with number formatting and the phone thinking it is elsewhere is an easy fix
Go to:
Settings -> mobile data -> SIM Applications -> tap "Roaming" -> tap "Select Mode"
I found "automatic" was selected by default.
Tap manual -> then choose National.
Signal is a separate matter. Is it in one place or everywhere you have bad reception?
I'm a Very Insightful Person, I'm here to share knowledge, I don't work for Virgin Media. Learn more
Have I helped? Click Mark as Helpful Answer or use Kudos to say thanks