Why my phones is not vibrating after opening all the settings

@akhandprat66558 if everything else functions properly and since you have already checked all teh settings, it is possible that this is a bad vobrator. At this point I would suggest that you replace it. It's a bit of a pain to get to it and since iFixit does not yet have any guides for this, use something like this video. at around 3:20 you can finally see the vibrator on the mid-frame of your phone. Replacements are readily available at many online stores.

While you work on your phone, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has a device with the same issues as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.

Repair is War on Entropy!