Kyocera 1135 - Manual (Page 11)

If the screen seems frozen and the keypad does not respond to keypresses,
reset the phone by completing the following steps:
1. Remove the battery door.
2. Remove and replace the battery.
If the problem persists, return the phone to the dealer for service.
Qualified service
If you are experiencing problems with your phone, see “Getting Help” on
page 86. If you have additional questions, contact your service provider for
technical support. If the problem persists, return the phone with all
accessories and packaging to the dealer for qualified service.
Accessories
Use only Kyocera-approved accessories with Kyocera phones. Use of any
unauthorized accessories may be dangerous and will invalidate the phone
warranty if said accessories cause damage or a defect to the phone.