Step 20
iPhone 5s Repairability: 6 out of 10 (10 is easiest to repair)
+ Just like in the iPhone 5, the display assembly is the first component out of the phone, simplifying screen replacements.
+ The battery is still fairly easy to access, even though it's not technically "user replaceable."
- The battery has lost the 5's convenient pull tab, and gained more resilient adhesive—it now requires heat and prying to remove.
- The fingerprint sensor cable could be easily ripped out of its socket if a user is not careful while opening the phone.
- The iPhone 5s still uses Pentalobe screws on the exterior, making the 5s difficult to open.
- The front glass, digitizer, and LCD are all one component, thereby increasing cost of repair.

Step 19
HTC One M8 Repairability Score: 2 out of 10 (10 is easiest to repair)
- It's very difficult—although no longer impossible—to open the device without damaging the rear case. This makes every component extremely difficult to replace.
- The battery is buried beneath the motherboard and adhered to the midframe, hindering its replacement.
- The display assembly cannot be replaced without tunneling through the entire phone. This makes one of most common repairs, a damaged screen, very difficult to accomplish.
- Copious amounts of tape, adhesive, and copper shielding make many components difficult to remove and replace.
+ Solid external construction improves durability.

Step 23
Samsung Galaxy S4 Repairability Score: 8 out of 10 (10 is easiest to repair)
+ The battery can be replaced in seconds, without any tools.
+ Very easy to open and access internal components.
+ There are only 11 screws in the entire device, all standard Phillips #0 (no proprietary or security sizes).
+/- Most of the smaller components are modular and can be replaced individually, but several of them are adhered in place, increasing replacement difficulty.
- The glass is fused to both the display and the display frame, increasing repair costs.
- You'll have to go through the entire phone in order to replace the front panel, since everything is built into the back of it.