Ask me anything! Also, two more things about battery life. If I don't forget, I'll update my comment with how good the improvement is. Secondly, I spoke with another 5T owner who had it for roughly the same amount of years. He charged it only when it was running empty (<10%) and also don't keep it on the charger when it reaches 100%. His phone was still lasting a full day with the original battery, when I used mine for a couple hours of screen time, I had to charge it after diner if I wanted to make it through the night.

Excellent guide, and excellent phone! PS, this might not be the right place, but I'd love to hear anyone's experiences on custom ROMS like lineageOS.

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I was lucky enough that all the adhesive (step 19) was still on the battery so the phone was clean. I used the recommended Tesa 61395 tape that lets you peel strips of double-sided tape and place them on the new battery. I roughly copied the diagonal lines on the old battery so it would stick in the same places, and after placing the battery it seemed to seat pretty firmly into the phone.

Finally, I had this phone since Nov 28, 2017 and the phone had no dust or signs of liquid inside. I've used it in the rain many times and also I expected at least some dust to make it into the phone, but nothing! One note about this, there's a very thin black foam strip on the outer edge of the screen where it touches the back frame. You can see it pretty clear in photo 10 and 11. My phone definitely wasn't as dirty. Very impressed, hope the new battery helps last the device another year or two!

[3/4]

Final tricky part was placing back the two metal shields, they luckily have a little bit of springiness to them so you could bend them and use a small pointy object to snap it back in place. But they don't seat very firm, you can wiggle them even though you've placed them back. You might want to try wiggling it with your finger(nail) a little bit before removing them the first time around (step 10 and 14) so you know what it should feel like when placing them back.

Oh and the battery was in there pretty firm as well. I used the 'guitar pick to lift the bottom right corner (with the QR code on it, step 17) and simultaneously lift the green pull tab. Eventually it popped out, no heat application was neccessary. Although, be careful of the main flex cable (step 16), you should fold it back or use some tape to hold it in place. Once the battery comes loose, it shoots from the phone with force and could tear the ribbon connector.

[2/4]

The most tricky part for me was step 14. The upper main flex connector was stuck to the metal shield. As you can see in the photos of this guide, there's quite a lot of glue residue on top of this connector (looks like cooling paste). When I removed the shield, the connector was still stuck to it and also came off. I had to the blue opening tool to get them separated, and I almost tore the ribbon off the main flex connector.

Second most tricky part was step 5, removing the screen from the body. The clamps are very strong and after removing the screen you can see why, they are solid metal attached to the phone's frame. You can see the 4 grey lumps in step 6 on the side of the screen. So you don't have to worry about accidentally breaking one of the clips! Although, when you try to remove the screen, don't stick anything deep into the phone, you might scratch components.

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