L1 Service Manual
Detail steps:
1. shut down the phone.
2. Long press Power Key + Volume up key for about 8s to enter recovery mode. Press "power" key
to confirm----"Reboot the system now", it will display the three type(as below image shows) for you
to choose.
2.7. Cell phone maintenance
1)
Equipments for handset test.
Rev.
1.1
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5056A/J/M/X/D/W/E/T Level 1 Service Manual
TCL
Communication Ltd.
Page
12/27