Zte A139+ User Manual page 13

chemical or abrasive cleaners as these could damage the phone.
As your mobile phone can produce electromagnetic field, do not place it near
magnetic items such as computer disks.
Using the phone near electrical appliances such as TV, telephone, radio and
personal computer can cause interference.
Do not expose your mobile phone to direct sunlight or store it in hot areas. High
temperatures can shorten the life of electronic devices.
Keep your phone dry. Any liquid may damage your phone.
Do not drop, knock or harshly treat the phone. Rough handling can break internal
circuit boards.
Do not connect the phone with any incompatible enhancement.
Do not attempt to disassemble the mobile phone and battery.
Do not store the phone with flammable and explosive articles.
Do not charge the mobile phone without battery.
Precautions for Potentially Explosive Atmospheres
Switch off your phone prior to entering any area with potentially explosive
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