I'm going to France on Monday and I was thinking of paying £5 for the 250mb of data. I was wondering how quickly that goes and if I get to France will I randomly need to pay any extra fee? And also when is best to text the number to add it on? Thank you
The only option is to send the text when you arrive in France. You need to have enabled roaming on both the phone and account 24 hours before you go, if not earlier. There has been an ongoing issue with roaming, but it's has or is being resolved.
If you phone fails to pick up a French network, firstly just switch off and back on if that fails do a manual network selection, one of those options should work.
If you have voicemail active, then to avoid charges set up a PIN number or as a last resort stop the service and restart when you return.