[LeEco Le Max 2 Guides, News, & Discussion] Lizard82:
Hey guys...

Believe it or not my FP is working! It wasn't working since the day I received the device! ;)

Right now I'm totally sure that the problem is based on software / drivers inside the firmware / libraries.

Like i explained in my previous post i tried to figure out what caused the problem of the FP. And also that it's hard to find any information about the FP module itself.

Well after a couple of days researching the Internet i know that there are only 3 Smartphones with Qualcomms Ultrasonic Fingerprint Technology that you can buy so far.

1. Leeco Le Max Pro (X910)

2. Leeco Le Max 2 (X820, 821, 822, 823, 829...)

3. Xiaomi Mi 5s

This fact is one of the major parts of the story. The sensor and also the FP specific software / firmware / libraries are all produced and written by Qualcomm. And with only such a few devices

it's almost like a beta test for Qualcomm compared to the hundreds of millions FP modules which are working in more popular devices all over the world. You just need to take a look at this website to understand what i mean.

First link is how the ecosystem of FP is working

http://biometrics.mainguet.org/appli/appli_pdaphones.htm

Second link is a list/history of devices with included FP-Sensors from the different manufacturers

(keep an eye on the most built-in sensor manufacturers)

http://biometrics.mainguet.org/appli/appli_smartphones.htm

I don't think that Qualcomm had share the complete source code or how it works to Xiaomi and Leeco. So both manufacturers had to integrate the source into their software as good as possible. And that went wrong!

Our Le Max 2 and also the Xiaomi Mi 5S are facing the same problem in general. A not working or only poor working FP sensor.

The only difference between this two is that our sensor stopped working and on the MI 5s it causes extremely high battery drain. On the Xiaomi side i wasn't able to find such a high number of so called "dead fingerprint sensors".

To be honest I'm sure that I only read about 5 or 6 completely defect FP in combination with the Mi 5s.

Also keep in mind that Xiaomi has better sales with Mi 5s compared to the le Max 2. So if it really should be a hardware problem then why we have so many people complaining about dead FP on Le Max 2 and only 5 completely dead ones Xiaomi!?

Remember that Xiaomi is a 10 times bigger Hardware company with so many more developers employed. Leeco is only building Smartphones for 2 years now. So they don't have the experience and knowledge of implementing the software they get from Qualcomm. And because of this the FP on Le Max 2 is dead after a while and the Mi 5s "just" overheating but still running without dieing hardware.

To understand what im meaning related to the implementation of the Qualcomm libraries and so just take a look how many processes are integrated into the Android firmware.

Go to settings > apps > all

And scroll down to

com.qualcomm.qti.biometrics.fingerprint.service

Click on it and then scroll down to battery. After you tap on battery you see what I mean.

But both devices can go back to the point where they were working as the they should. By flashing back a previous official firmware without the bug for example.

A couple of guys were lucky to have the Le Max2 FP sensor working again by flashing a original stock rom. Same thing with the Mi 5s of cause. That makes sense cause you wipe everything (system, kernel, data, fingerprint settings) by doing this.

After that and if you doing the right steps you start from scratch with your phone/system.

A hardware failure looks different! ;)