AT&T S4 can not get into recovery mode (MF3)
Model number: SAMSUNG-SGH-I337
Android version: 4.2.2
Baseband version: I337UCUAMF3
Kernel version 3.4.0-812098
Unlocked, Rooted with 3rd party software, show "samsung custom” every time when turned it on, then AT&T logo...
Want flash "danvdh google edition 4.4.2 ROM", and already transfer it to sd card.
Installed rom manager. Want to backup rom before flash, can not do it. When select "backup curent rom", restart, top left showed “recovery booting”, then saw a robot laid down with "!", showed "no command" under the robot. up showed:
-- Applying muli-cs ...
applied the csc code: att
successfully applied multi-csc.
Top left showed some like
android system recovery <3e>
reboot system now
apply update from cache.
When select reboot, showed "error" first, then reboot.
Please give some suggestion, Many thanks!!!