User`s guide

19
7. Troubleshooting
Problem
Corrective Action
Boot-strap disable
1. The power switch is off
2. The batteries cannot supply enough energy
3. The power adapter is off
PIN incorrect
1. Insert wrong SIM card
2. SIM card is locked，and the telephone should
be initialized by professional.
Loss connection in
talking
1. The batteries energy is low
2. Signal intensity is low
Volume low Press [[▲]] while Talking