1) How to reset TEVI?

Please follow the below procedure to reset TEVI:

A) Forget the TEVI bluetooth name, [LYPERTEK] TEVI - L / R,  from the bluetooth list on the phone.
B) Put both earphones into the charging case; (make sure the charging case has power)
C) Press and hold both TEVI L/R for 5 seconds.  Remember to make sure you can see the light.
D) Once you see the light flash, release the fingers.  Then TEVI was reset.
E) Take out both earphones from the charging case, LED of one side earphone is flashing, which means it is at pairing mode.  
F) Follow the pairing procedure to connect TEVI with the phone again.

2) Can I use only one side?

Yeah, TEVI can be used individually. 

A) Take out both earphones from the charging case.

B) After TEVI connected to the phone.  Then put one of the earphones back to the charging case.

3) Where to download the Quick Start Manual ?

4) The white LED is continuously blinking?

Please try to RESET.