Originally Posted by Cromson
Which firmware version did you flash and which provider are you on?
Did you try use 2G Network only (just for testing)?
thanks, bro, I typed 5457 # * 6200 # in the keypad, and the phone was set on the "Global + LTE" option by dedault, so I changed it to Auto GSM/WCDMA, since my provider doesn't yet have an LTE network up and running, and now all is well
It seems that it has just been searching for an LTE network first, and when it couldn't find it, just hung and stayed out of service...