There is no JetX username at SmartSoft for players. You register at a casino, then open the JetX tile. Password resets go to that operator, not to this guide site.
Whose login
If an APK asks for OTP before you have an operator account, drop it. Register is the same idea: casino KYC, then lobby.
FAQ
Can I log in on this domain?
No. This is a static guide with a demo iframe.
Related: how to play, demo, strategy, RTP, crash game.
Open JetX at a casino after you have practised the round in demo.