[Samsung Galaxy W I8150] jakelq:
I just want to share my most stable maximum undervolting of my Wonder,

I did not say that I am the first one to post this, I know there are already successfully undervolted their phones.

I've learned this from Pepoluan post, I've forgot that thread already.

We all know that undervolting our device gives advantages, such as extending battery life, increases power supply, extends the life of the device and less heat.

Here's what i've used.

1. Latest CM9 Rom (cm9-20130603-UNOFFICIAL-ancora) by our master Arco68

2. Kernel capable for unvervolting- I'm using HurtSky's kernel ( 3.0.82ICSHurtSky V 3.5)

3. IncrediControl app from playstore

So here are the tabulation below:

Frequency Default V UV(My Setting) Difference % Savings
122880 900 750 150 16.7%
245760 900 750 150 16.7%
368640 900 750 150 16.7%
768000 1050 825 225 21.4%
806400 1100 925 175 15.9%
1024000 1200 925 275 22.9%
1113600 1200 975 225 18.8%
1209600 1200 1025 175 14.6%
1305600 1225 1050 175 14.3%
1401600 1250 1100 150 12.0%
1516800 1250 1150 100 8.0%
1612800 1275 1200 75 5.9%
1708800 1300 1275 25 1.9%
1804800 1325 1325 0 0.0%

I have conducted a stress test for every frequency to determine its most stable voltage.

TIPS:

- Use minimum frequency of 368 MHz since they have the same voltage with 122 and 245.

Advantage

- Improves scrolling ( based on my experience)

- Music clarity (also based on my experence)

- Launching Apps is much faster ( again based on my experience)

Disadvantage

- please let me know

Please, if you want to use this set up on your phone, please dont blame me if your phone crashes.

Please conduct a stress test first for every step down on undervolting for every frequency and here is the a Quick Guide below:

Quick Guide - Undervolting

What you need:

1. KERNEL - Capable for UnderVolting.

2. IncerdiControl App

3. Apps for Stress Test or Heavy Games or Benchmarking Apps.

4. Patience.

STEPS

1. Set the minimum frequency and maximum frequency of the CPU - the minimum should be the lowest existing frequency of the cpu and the maximum should be 1 step higher than the minimum (sample: min= 122MHz and max = 245 MHz)

2. Open IncrediControl app and set each frequency by 1 step down ( less 25 each),

3. Then apply, do not apply at boot first, ( so when it crashes it will revert back to the default settings)

4. Conduct a stress test or play heavy games or run a benchmarking apps to test the stability.

5. When it passed, repeat steps 2, 3, 4 until your phone crashes.

6. The previous lowered voltage before your phone crashes will now be the most stable undervoltage.

7. Record now the stable lowered voltage.

8. Next, increase the maximum frequency by 1 step higher (not the voltage).

9. The minimum frequency should be set to the recorded safe lowered voltage.

10. Open IncrediControl and set the voltage of the maximum frequency only by 1 step down (less 25).

11. Then Apply, do not apply at boot first,

12.Conduct a stress test or play heavy games or run a benchmarking apps to test the stability.

13. When it passed, repeat steps 10, 11, 12 until your phone crashes.

14. The previous lowered voltage before your phone crashes will now be the most stable undervoltage.

15. Repeat steps 8, 9, 10, 11, 12, 13 and 14 for the remaining frequencies, until you have determined the stable lowered voltages for each frequencies.

16. Now, after you have determined the undervoltage, apply it to your phone, no not apply first at booth,

17. Observe and stress test your phone for at least 1 hour.

18. if it will not crash anymore, you have now the Stable Undevoltage.

19. To be more safe, for daily use, increase the voltages by 1 step for each frequencies, except those which did not changed the value.

20. You can now apply the settings at boot.

21. Enjoy.

Note:

If your phone became unresponsive or vibrates continuously, that's the time that your phone is crashing, just turn off the phone, press the power for at least 10 seconds and it will turn off, or simply pull the battery.

TO THOSE WHO HAD SUCCESSFULLY UNDERVOLTED THEIR GALAXY W, MAY POST HERE AND MAY SHARE THEIR SETTINGS, SO SOME OF THE MEMBERS MAY GET AN IDEA.

Thanks to

Arco68

HurtSky

Pepoluan

honeyx

& Galaxy W Community