[Atrix 4G General] losdrivare:
DISCLAIMER: AS USUAL, THIS HOWTO IS PROVIDED "AS IS", I'M NOT RESPONSIBLE TO ANY DAMAGE TO YOUR PHONE AS A RESULT OF AN ATTEMPT TO FOLLOW THIS GUIDE.

There are numerous thread about the poor in-call sound quality of the Atrix. This thread addresses the problem where your voice sound muffled, where the people you are talking to have problems hearing you clearly.

The problem on my Atrix was dust build-up around the microphone. There is a small compartment below the microphone hole. Then there is a fine mesh protector located in a rubber sealing, protecting the actual microphone on the motherboard. The dust had gotten in through the microphone hole and accumulated in the small compartment.

Removing the dust and cleaning the fine protecting mesh made my microphone able to produce significantly more clear sound, especially in the higher frequencies ("s-" and "sch-" sounds). It was not a miracle cure producing crisp crystal-clear sound, but I'd say the sound quality went from "sub-adequate" and "annoyingly poor" too "perfectly acceptable, still not comparable to the best". Your result all depends on how much dust your Atrix has managed to accumulate over time.

What you DO NOT need:

* Use of force (unless specified in this guide)

* Use of sharp metal objects (unless specified in this guide)

* Impatience

What you DO need:

* Delicate fingers

* Patience

* Phone repair experience or general aptitude. If you are patient, careful and steady on your hand then you can do this, just take your time and read and think carefully before you act.

* ifixit teardown guide: http://www.ifixit.com/Teardown/Motorola-Atrix-4G-Teardown/4964/1

* Tools listed in guide above: Torx T5 tool, Plastic prying tools (AGAIN, avoid using metal)

General advice:

* read this guide in its entirety before going to work on your phone

* use common sense, I'm just a human writing this guide from the top of my head, trying to help people. This guide might not be 100% perfect, YOU (NOT ME) ARE RESPONSIBLE FOR ANY DAMAGE TO YOUR PHONE

* Phones are small and delicate, using force will likely break something.

* Before removing any "layer" (plastic cover, motherboard etc), lift slowly, softly, and MAKE SURE you won't break any cables or anything.

* Layers are often meant to be lifted in a specific way or folded in a specific direction. See how the cables go and bend, figure it out.

What to do:

1. Follow the ifixit guide all the way to (and including) step 7. Make sure to unhook the antenna cable from the chassis and to lift the connector straight up when disconnecting.

2. The microphone is on the bottom of the motherboard. The small compartment and mesh that needs cleaning is in the middle of the semi-transparent rubber sealing seen in the bottom of the picture of step 7.

3. CRITICAL AND HARD STEP! To get to the dusty compartment I removed the motherboard. (This might not be necessary, it might be possible to just fold the motherboard to the side with the connectors for the flat cables, thus not having to disconnect these. Try it out if you like.) It's a bit tricky getting the motherboard to get free. You need to use a bit of force to get the HDMI and USB connectors out of their sockets in the chassis, I pressed the motherboard away from the sockets using no more force than necessary. Make sure you get no "recoil" when they pop out! On the other side of the motherboard are the connectors for the flat cables. The flat cables and connectors are fragile, take care not to damage them. Two are just to pop out, one you need to lift the black bar/lever on the far edge to get the ZIF (zero insertion force) flat cable out. Connecting these cables again will be tricky, so if you can get to the compartment without disconnecting, that would save some time but it will be more difficult to clean with the motherboard hanging on too...

4. (See attached picture.) Lift the rubber sealing. Clean out any dust in the small compartment inside the front microphone hole. Clean the protective mesh and blow through it making sure it's not clogged. I used a slightly moist cotton stick for the cleaning, use no solvents.

5. Put everything back!

Hope this helps! :)