Zte U5100 User Manual page 8

 Never take your phone apart. Please leave that to the professionals.
Unauthorised repairs could break the terms of your warranty.
broken antenna
 Don't use your phone if the antenna is damaged, as it could cause
injury.
around children
 Keep your mobile out of children's reach. It should never be used as a
toy and it might not be good for their health.
original accessories

Only use the original accessories supplied with your phone or those
approved by the manufacturer. Using unapproved accessories may
affect performance, make the warranty void, break national regulations
on the use of mobile phones, or even cause injury.
near explosives
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