To perform hard reset for your Huawei S7-701u you may need to save all of your apps and files to your memory card and take it out to prevent deleting files when performing hard reset, so here is how to do it:
1. Press and hold the power button + volume up + volume down.
2. When you feel the vibration,release the power button.
3. When the Android logo appears, release the volume up.
4. You will see some running lines in the Android logo, hold still the volume down and wait for 10 seconds then release it.
5. Then let it reboot by itself.
6. Hard reseting done
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