Hi,
With 640XL dual sim in UK, I have swapped the two sim card to see what's going on about the two different radio:
SIM 1: Up to 4G/LTE (H+ with Tesco, 4G with Three)
SIM 2: 2G only (tried with Three and Tesco)
Hello Microsoft,
Mhertel has got a very relevant question: and if there is not 2G...