[Samsung Galaxy S8 Guides, News, & Discussion] NekKratos12:
hello!. i'm new here. and since i couldn't find a guide to replace my old exynos to a new old snapdragon cpu. i made this guide. i hope it usefull for you!

you can use these steps to swap EXYNOS to SNAPDRAGON // SNAPDRAGON to EXYNOS.

NEEDED:​

Laptop with internet access. for youtube dissasembly guide

Phillips Screwdriver type #00.

Some tools to separate the back glass. like, a credit card, and, if you can, use a hairdryer.

Find a Working S8 G950U. i would prefer to use G950U1. (G950U1 means that it's a full stock Galaxy S8 With Snapdragon CPU, and it doesn't have any bloatware from carriers. We will call this S8 from the us as: "S8 US".

Use the airdryier or, destroy your back glass (in both cases, be carefull. the fingerprint reader has a ribbon cable, and it is attached to the back glass.)

discconnect the fingerprint reader, and remove completly the back glass.

TAKE A PICTURE BEFORE PROCEED, (NOT OPTIONAL- IMPORTANT FOR ANTTENA CABLES UNDER THE LOUDSPEAKER).

4. Do a full Disssasembly of the "S8 US". and the same for the exynos phone. (be carefull with both phones.)

The "S8 US" has an AUX anttena attached to the left wall of the chassis, almost under the motherboard. so, when removing the Daugherboard be careful. don't break the cable. the international doens't have that.

3. Now, it's time to replace.

​

What can i Reuse?:​

for example: my iris scanner is not working.. can i use the exynos variant iris?:

Iris scanner: You can use in both models, i noticed that both says "G955F". and both are working for both phones.

The exactly same thing for the battery. both models works fine.

Fingerprint reader: works fine in both.

i didn't tried swapping the LoudSpeaker. but seems to be the exactly same thing. i checked and i could'nt find any differences.

Display: works fine in both models. (originally meant for G950F, but also works with g950u motherboard.).

Chasiss: Exactly same chassis everywhere on every model. only diffefences are colors. and nothing more.

Earpice (for phone calls): Both are exactly the same. no difference. Swap it if you want/need. It will work fine.

WHAT YOU CANT REUSE?:​

NFC: You tell me. i coudn't try it.

Selfie Camera: IT won't work. i tried deleting camera app cache an data. still not working. US version have: "G950U" written in the back of the camera. while international says "G950F".

Back Camera: Not the same model. S8 international uses Isocell (Made by Samsung), while The US version has the IMX333 (made by SONY.)

DaugherBoard:

Daugherboard: NOT THE SAME. BE CAREFULL!! : it contains the usb C port, microphone, and other things. The US version has an extra anntena, as i menitoned beforem, and uses different voltages to power the cpu and batery.

US WITH US MOBO. INTERNATIONAL WITH INTERNATIONAL MOBO. thats how Daugherboard works.

(if you want to put the US daugherboard in the exynos chassis: all s8 chassis have the dedicated space for this cable, under the loudspeaker. don't worry. you can also do the same to swap from snapdragon to exynos.)

4. put first: daugherboard, put in place the microphone please!. then, install the selfie camera, the earpiece, and the iris scanner.

5.Put in place the motherboard. be carefull, and make sure that not a single cable get trapped under the motherboard (im talking abot the front sensors, camera, iris, battery, display and antennas). and also the auxiliar antena from the US daugherboard wich is in the left side . Check that both antenna cables from the right side.(blue and white / black and white) are properly under the motherboard.)

press it down until the daugherboard cabble under the motherboards makes a "click" sound. or it is completly attached.

check it with the photo that you took before removing parts.

5 OPTIONAL:. now, you may want to test. i don't recommend it, but put some screws on the motherboard on top and bottom. usually, at this point some buttons doen'st work. you have tu presss a bit the motherboard side where the buttons are to make it work. that's why i dont recommend it.

6. Put everything on place including nfc and wireless charging, and fingerprint and close the phone.

7. Turn it on. put sim card, and ENJOY!