Last year I was away in Germany for a while. I'd set my phone to roaming, and it automatically found a network. However, after a moment of two it would somehow disconnect, and I'd have to switch to aeroplane mode and back again for it to reconnect, only for it to do the same. I'm using a oneplus 7 pro.
I spent sometime fiddling with settings, and also some time on the phone to Virgin, but wasn't able to resolve it. It wasn't the end of the world - there was just enough time to open google maps and check a route, or get my covid passport up or whatever - but it clearly isn't ideal.
It was all fine again back in England, and I kind of forgot about it - but I'm about to go abroad again, to Spain, and wanted to know if there was any advice to stop it happening again? Thanks!