UTStarcom C1100 User Manual page 20

Getting Started
1. In idle state, switch the phone off by pressing and holding
(otherwise, some user settings might be lost)
2. Remove the battery cover
With the back of the phone facing you, press the top of the battery
cover and slide the cover off
3. Remove the old battery
Disconnect the cord by firmly gripping the connector (not the battery
connection cord) and pulling gently upward
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