Before the OTA update there was a known issue where if the phone was connected over 4G for a while the phone could not switch back to 3G when it moves out of a 4G area and would instead drop to 1X.
With the OTA update this 3G issue has been resolved, but now there is a similar issue with the 4G connection. If I am in a 4G area and I want to disable LTE to save battery life, and then later decide I want the faster 4G speed and re-enable it, it will only stay on the 3G connection. The only two ways to remedy this are either putting the phone into Airplane Mode (does not always work) or to restart the phone.
At first I wasn't sure if this was a real problem when I first had it, but I waited a while to post this until it had happened multiple times.
Anyone else feel free to test this on their phones and post about it please.
By the way I use LTE On/Off to control the data radio.
Sent from my HTC Rezound