sometimes my phone simply doesn't get any connection. It's an Samsung Galaxy S4 mini. Even though there is network with good signal and the 3g / h+ is connected, nothing loads. The icon on the notification bar shows only the up arrow flashing from time to time but no arrow down, meaning no data being received.
Then later that day when I'm in another part of the country the connection is fine.
It happened a couple of days ago when I was in Milton Keynes (postcode MK9 1LA), I tried to get connection for 20 minutes and nothing came through even after restarting the device.
The same happened today, I couldn't get any data this morning on CV4 7AL but then half an hour later it miraculously came back to normal.
I'm really sorry that you're having some issues with Mobile data. I want to look into this for you.
I've ran checks on both of the areas you mentioned and I can't see anything wrong in particular on our side. How's everything looking for you currently?
If you're still having issues, I would suggest first of all performing a hard reboot by popping the battery out of the phone while it's turned on. This will refresh the phones settings and cache. Give it a go and let me know how you get on.