The Most Common Repairs On Smartphones

Not every hardware problem with your phone can be easily repaired, but many can. Depending on the type of phone you have and whether you signed up for insurance on your device, it may be cheaper to do your own repairs (and void your warranty, of course). Here are some of the most common types of repairs and concerns you'll need to be aware of with them:

Broken Screen/Digitizer: Fixing a broken screen can be either fairly simple and cheap or extremely expensive depending on how it's built. In both cases, you'll need to disassemble your device (guides for many popular phones can be found below). In some cases, the glass and digitizer (the layer which translates taps into input) may be fused together which makes a replacement unit very expensive. If they are not, however, you can buy a replacement screen fairly cheap.

In cases where the display is not fused to the glass, you may be able to replace either the glass by itself or the glass and digitizer. Both are fairly simple repairs, but if the digitizer is connected to the glass, you'll need to connect a data cable, which varies by model. Here is a collection of guides for the most popular phones of the last couple years, but you can find others (see the next section below).

Headphone Jacks: Any time moving parts are introduced to a device, it can increase the failure rate. Headphone jacks may not be motorized, but they see a lot of action from headphones and stress can frequently be placed on the contact points if you it while working out or other heavy activity.
Once your device is opened, headphone jacks are relatively easy and cheap to replace, but this assumes you can get in. Devices with unibody designs like the HTC One are difficult to enter no matter what task you're trying to accomplish. Headphone jack units are usually self contained and plug directly into the motherboard, though they are sometimes attached to the speaker assembly. You can check out one of the guides below to see how easy it will be for your device.

1

Loose/Stuck Buttons: Like headphone jacks, buttons can be replaced roughly as easily as the phone itself is to open. You can buy replacements for most hardware buttons in a handset and swap them out without too many problems. However, if you're uncomfortable cracking open your phone, you can solve a lot of button problems with software.

Nothing lasts forever, and that's doubly true for your gadgets. Unfortunately, 

Most buttons are attached via cables to the motherboard and they can be very delicate, so be careful when re-attaching new hardware. You can usually find out how to replace the various power and volume buttons by following the standard teardowns. Be sure to read ahead first before purchasing replacement components.