I'm in the UK on the Three network. I am using Stamina mode with Extended usage enabled to save power, but am seeing a consistent issue where, after an hour or two, the phone completely loses it's mobile data connection and will not reconnect without rebooting. This makes Stamina mode totally useless as it is not reconnecting when the screen is turned on.
The signal indicator on the phone shows no "H" symbol when this happens, yet About -> Status indicates HSPA is present but mobile data is disconnected.
I have the latest firmware installed.
