Hammer nut mobile phone dual card dual standby one card how can there be no service?

Show the possible causes and solutions of "no service":

1. Flight mode, just turn it off. Or the signal is weak, consult the operator.

2. No recognition (such as telecom SIM card for mobile phone)

3. Whether the check card trough is loose or deformed, send it for repair.

4. Restart the phone (if the battery is detachable, it is best to remove the battery and restart it).

5. Put the SIM card on another mobile phone and test whether the SIM card is faulty.

6. Software or system reasons. Brush machine, it is best to use official ROM.

7. Mobile phone hardware failure, sent for repair.

Power consumption problem log collection tutorial

1. Open the settings of the mobile phone->; For this machine, click the software version position at the bottom for 7 consecutive times, and the mobile phone will prompt that it is in "developer mode", and there will be one more "developer option" in the global advanced settings;

2. Open "Developer Options", click "Submit Error Report", open the problem classification, select the power consumption problem, click Start Collection, and then return to the desktop to use the mobile phone normally. When the problem of abnormal power consumption is found again, re-enter the interface, then click Finish Collection, select the start time and end time of abnormal power consumption, enter the problem description, and click Submit Feedback;

Note: The shortest time to collect power consumption problems is 1 hour, and the longest time is 24 hours. Do not turn off, restart or charge during collection.

3. Click Submit, and you will be prompted to send successfully. You can click "My Feedback" in the upper right corner to view the historical feedback record and confirm that the log has been submitted successfully (if the submission fails, you can click resubmit).