(Only available for USA) 

  Firmware upgrade:

1.Download driver from Yihi website http://yihisxmini.com/support/000003002003.html 

File name: SXi-v2.8.6.6-Setup-20180611-1445-English
Install it in your PC and then click Connection to install Driver
2.Download latest firmware version SX490_20200801
3.Turn off and remove battery out of device
4.Remove your atty from device
5.Connect USB cable to PC

6.Open SXi - Upgrade - Open file - upgrade

 Version A：Lock adjust buttons only, fire button still working

1) To clear puff counter manually. Press & hold + button for 1.5 seconds (Puff counter won’t reset after changing batteries).Also includes puff counter to count as a 1 second puff.

2) To enter bypass mode: Press & hold - button for 1.5 seconds.

SX490_20200801-1126_V1231-LockedFreeFire.zip

Version B：Lock all buttons, you cannot fire and vape when locked

1) To clear puff counter manually. Press & hold + button for 1.5 seconds (Puff counter won’t reset after changing batteries).

Also includes puff counter to count as a 1 second puff.

2) To enter bypass mode: Press & hold - button for 1.5 seconds.

SX490_20200801-1121_V1230-LockedNoFire.zip