![E28 R2821 User Manual Download Page 11](http://html.mh-extra.com/html/e28/r2821/r2821_user-manual_519330011.webp)
11
1.3 Battery Installation
Warning
1. DO NOT remove the battery or switch the power off
abnormally when the mobile phone is power-on or in the
charge status, to prevent the mobile phone from damaging or
the data from losing.
2. DO NOT contact the battery with conductor, to prevent
damage from short circuit.
3.
DO NOT use
battery which is not from original manufacturers
or is not specified model.
①
②
Power off the mobile phone before removing the battery, and then take out the SIM
card.
Take out the SIM card
①
②
Power off the mobile phone before removing the battery, and insert SIM card,
whose side with the cut off corner should be upward.
Insert the SIM card