Why you must remove Moto G back cover
For Moto G (including Moto G 2nd Gen), the SIM card slot is under the back cover. So, to insert SIMcard, you must remove Moto G back cover.
In addition, the micro SD card slot in Moto G 2014 is also under the back cover. You have to remove the Moto G back cover to put in your SD card.
However, for many new Moto G or Moto E owners, it can be frustrating to find the correct way to remove Moto G back cover due to Motorola’s unique design for the back cover.
You cannot peel off the Moto G back cover.
Please follow this guide if you want to remove Moto G back cover properly. Otherwise, you may damage the back cover.
How to remove Moto G back cover? (for Moto G and Moto G2, Moto G3, Moto G4, and Moto G5)
Step 1: Power off your Moto G
It is recommended to remove Moto G back cover only when the phone is powered off.
To power off Moto G, press and hold the power button and follow the on-screen instructions.
Step 2: Turn Moto G upside down
You need to turn Moto G upside down so that the USB port is facing up. This is the most comfortable orientation to take off Moto G back cover.
Anyway, Motorola designs it in this way.
Step 3: Put your finger in the USB charging port, as shown below.
Step 4: Press your thumb of the hand in the centre of the back (Motorola logo), as shown below.
You need to use two hands to remove Moto G back cover.
You also need to press the Motorola logo hard (apply some force, not just put the thumb there) so that it is easy to pry the cover off.
Step 5: Pry the cover off.
Please remember it is not necessary to use any tools to remove Moto G back cover. Such tools may damage the cover or internal parts
If you still have problems to take off Moto G back cover, you may check this official video.
How about Moto E back cover?
Moto E back cover shares a similar design of Moto G back cover.
So, you can remove Moto E back cover with the identical method mentioned on this page.