If the vibrate function of AT&T/GSM iPhone 4 isn't working or is very faint, you may need a new vibrator assembly. If you're out of warranty but have just a little bit of ninja skill, it's a very cheap and easy repair to perform yourself.
It's worth noting that this guide is only valid for the AT&T or other GSM variant of the iPhone 4. The iPhone 4S and Verizon/CDMA iPhone 4 are very similar internally but very different from the GSM variant of the original iPhone 4. So if your iPhone 4 is not AT&T/GSM, proceed no further young Jedi!
Disclaimer: As with any repair, iMore nor PXLFIX can be held responsible for any damage you may do to your device. It’s also worth considering that opening up your device to perform any repair or modification can and will void your Apple warranty. If you don’t feel comfortable opening your device, don’t. Use extreme care and caution when performing a repair on any device.
PXLFIX recommends using only quality and genuine parts from a reputable supplier like eTech Parts. They have quality parts, tools, and much more for all your repair needs.
You should always power off your device before performing any type of internal repair work. Simply hold down your top power button and Slide to power off.
All you need to do now is replace the back on your iPhone 4 and put the two dock connector screws back in.
That's all there is to it! Have you done this repair yourself? Let us know how it went! Want to know how to perform another type of iPhone repair or modification? Send me suggestions to firstname.lastname@example.org or leave a comment in our brand new Mod and DIY Repair Forum!