A:AnswerYes. LG V20 has replaceable battery.
There is a small "button" along lower side edge. Pressing that will release the back cover.
When replacing back put top edge in place & gently press at one side then the other. Continue working from top to bottom alternating side to side.
That should snap it fully back in place.
Hope this was helpful!
A:AnswerIf the description ends with (Verizon) or some other carrier, then No. Verizon phones also can not be used with SIM cards from boost mobile or cricket wireless. Verizon uses a different network signal than most other carriers.