Generally, official Recovery will have the apply sdcard: update.zip (Brush ROM upgrade package) option.
Android system recovery <3e>:
Rebott system now: restart the system
Apply sdcard: update.zip: flrom ROM package
Wipe data/factory reset: Restore factory Value
Wipe cache partition: Clear partition cache
Apply sdcard: latest, and then click apply sdcard: update.zip to add the downloaded ROM package (equivalent to reinstalling a system ).
When you start your Android phone, press (house key + "volume + key" and open key) to enter the Recovery mode of the Android system. Apply sdcard: update.zip is displayed here. Unplug the battery and exit this interface. If you see the Android system recovery <3e> In the first example, your Recovery is the official Recovery. If it is better to refresh the machine to a third-party Recovery, the function will be more powerful and the machine will be more convenient.