@sudipp4 Umm, too many little things to have to talk about. The answer is yes and no. If your devices are currently connected to Uphold or Gemini, then the BAT you’ve earned should be sent to there during the payout period. Obviously when you first install a new browser or whatever, it will start at 0. It’s going to be seen as a new device, but that doesn’t disconnect your previous one from Uphold/Gemini.
When you’re guaranteed to lose it all is if it wasn’t verified with Uphold or Gemini and then you uninstall or whatever else. This is because if not connected to Verified Wallet, it’s instead stored in the browser.
If you have time, try to skim through PSA: User FAQ - Support & Answers