Zte R621 User Manual page 8

 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 or battery.
 Do not store the phone with flammable or explosive articles.
 Do not charge the mobile phone without battery.
 Some electronic devices are susceptible to electromagnetic interference
sent by phone if inadequately shielded. Please use phone at least 20
cm or as far away as you can from TV set, radio and other automated
office equipment so as to avoid electromagnetic interference.
 Operating phone may interfere with medical devices like hearing aides
and pacemakers, or other medical devices in hospital. Consult a
physician or the manufacturer of the medical device before using phone.
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