TUBI T7 Manual Del Usuario página 71

Don't try to disassemble the phone. The non-professional treatment will
damage the phone.
Don't drop, knock or shake the phone, otherwise the internal circuit
board will be damaged.
Don't use potent chemical, cleaning solvent or strong detergent to clean
the phone.
Don't use paint to coat the phone; the paint will block sundries in the
moving parts to affect the normal operation.
When replacing the antenna, you can only use the matched or approved
antenna. Unapproved antenna or the refit accessories will damage the
phone and breach the related regulation of the wireless device.
All the above suggestions apply equally to your phone, battery, charger
and accessories. If they can't work normally, please send it to the nearest
qualified maintenance station.
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