My phone seems to have a weaker vibration than my wife’s. We got them at the same time from the Kickstarter. I almost always have my phone on silent and there is a noticeable difference between the phones vibration strength.
Could you try the following:
- I’m assuming your phone is updated to SW6. If you are unsure, please check Software update available
- Clean cache parititon
- Install this Test app and test the vibration for different timings. Note: You have to press the power symbol in the app to switch on the vibration.
Let us know results of #3 above.