Start your LG Optimus 4X HD Android smartphone in Safe / APX Mode. The safe mode will allow you to access the device if a setting or software has caused an issue or testing out new configuration parameter settings, and so on. APX Mode allows you to write any partition, so if you brick the tablet it is possible to resuscitate it. Once that is done you will normally just use fastboot to flash the recovery.
LG Optimus 4X HD APX / Battery / Safe Mode:
FIRMWARE Upgrade Mode:
LG Optimus 4X HD Phone Photos – LG Cell Phone Pictures
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All the features are best but LG is not a big brand but the device is best to enter in the competition. I like the design very much.