How to Overclock iPhone 3G, 3GS, and 4!

[corkey20000]

still the same for my 3G set to 550.. hmm... ima stick to plist edit.. its fast and save battery for some reason.. or just my feeling.. ;P

What's this? Do tell.

[Cyanide89]

What's this? Do tell.

This changes a value in a .plist file to "remove" CPU restrictions. This is only for power management and will do nothing but keep the CPU running at full. It will kill the battery faster. It's also a placebo effect as the CPU is maxed all the time it seems faster.

[Assassination]

How you do this crap? i follow instructions and My 3G shows the boot logo...Flashes...Now the recovery Logo. i had to restore but i really wanna know how to this mod. So can someone please give me steps.

My FStab For My iphone 3G:
su
alpine
sysctl -w hw.cpufrequency_max=540000000
sysctl -w hw.cpufrequency=540000000
sysctl -w hw.cpufrequency_min=500000000
/dev/disk0s1 / hfs rw 0 1
/dev/disk0s2 /private/var hfs rw 0 2

i use a alternate file transfering way like "diskaid" And "ifunbox"

its the same as Winscp but without passwords and stuff

Im on 4.1....i know its not tested but i wanna test i just need the right instructions

[thazsar]

I think u need to remove a '0' from your last (minimum) string. Better yet, instead of 5000000000, make it 050000000.

Right now, you are setup to have your minimum processor speed running at almost full capacity!!!!

[hadzo]

Why do people still talk about this. It clearly does not work. Just "under clock" it and see if it reduces performance. It won't, it does nothing.

[thazsar]

I'm kinda thinking the same thing! When I first did it, the phone seemed snappier but now that I've used it for a while, it doesn't feel any faster than normal. This is on an ip4, though, but the 3Gs and 3GS' I've done this to still feel quicker. Verdict is still out on this mod.....

[Cyanide89]

Why do people still talk about this. It clearly does not work. Just "under clock" it and see if it reduces performance. It won't, it does nothing.

Finally someone is listening to my posts. I only said this 20 times now.

Bottom line... It does not work.

[hadzo]

^ LOL

I've said it few post back already

The reason 3G, especially 3G feels snappier might be cuz of that fact that in order for this to work you have to reboot and we all know that restart wipes memory clean, and kills all processes. In other words after you restart a 3G it will almost every time feel snappier until you start loading all of other apps and then it will gradually slow down.

I’m sure there is a file where you can alter processor speed but I’m pretty sure this isn’t it.

[macfan406]

the fstab command is not what controls clock speed. something tells me its just a check, which in theory may still work, but you would also need to tell the phone's CPU to clock at that speed. So while the check is registering a 3G at 600MHz, its still 412, and waiting to be changed to match the check...if i make no sense then lemme know cause i'm not an expert on the topic, but i am knowledgeable..

[Assassination]

Ugh Jesus! This whole thread is FICTIONAL! My 3G is USELESS. i tried disabling daemons but i didnt tried the delete language packs. Langauge Packs seems useless to me. its just memory freeing up

[corkey20000]

Mods, delete this thread already. Hate to see someone come along and actually attempt to do any of this.

[Cyanide89]

Mods, delete this thread already. Hate to see someone come along and actually attempt to do any of this.

Agree. Take this **** down, it seems several people have already fallen victim.

[TristianLyons1022]

Mods, delete this thread already. Hate to see someone come along and actually attempt to do any of this.

I agree, tried this on EVERY model of iPhone except a 2g and saw no discernible difference in performance before and after. Other than something halved the battery life on the iPhone 4. Who Knows?

[jbode4]

well i tried this on my 4th gen iPod touch and i had to restore -.- thanks guys -.-

[Cyanide89]

well i tried this on my 4th gen iPod touch and i had to restore -.- thanks guys -.-

Read the whole thread next time.

[F. B. I. Guy]

Doesn't work anymore, but Didn't it work pre-2.0?

[bandit12289]

Use the reset function in the general section in the iphone settings and select the reset all settings then you will find that you get a dramatic speed increase. However, you might need to do this every month or so.

[Cyanide89]

Use the reset function in the general section in the iphone settings and select the reset all settings then you will find that you get a dramatic speed increase. However, you might need to do this every month or so.

Also download iWipe. It zeroes all free space.

[iwannamod]

i put the corrections and when i open isystem to see what it says i still says its at 412mhz. wtf?

[VoRTeX15O]

Hey guys, as far as i know, this works on iOS 4.0 - iOS 4.0.2. So, here are the instructions!

1: SSH into your iPhone and goto /private/etc and backup the "fstab" file.
2: Open up fstab in TextEdit (Mac) or Notepad.
3: Add the following lines:
su
alpine (Unless you changed it to something else.)
sysctl -w hw.cpufrequency_max=???000000 (Replace ??? with the MHz Ex: 600)
sysctl -w hw.cpufrequency=???000000 (Same as above)
sysctl -w hw.cpufrequency_min=???000000 (Replace ??? with the MHz you want when the iPhone is sleeping, etc..)

Add those before:
/dev/disk0s1 / hfs rw 0 1
/dev/disk0s2 /private/var hfs rw 0 2

So, in the end, it'll look like this:

su
alpine (Unless you changed it to something else.)
sysctl -w hw.cpufrequency_max=???000000
sysctl -w hw.cpufrequency=???000000
sysctl -w hw.cpufrequency_min=???000000
/dev/disk0s1 / hfs rw 0 1
/dev/disk0s2 /private/var hfs rw 0 2


4: Reboot your iPhone!

(PS: If you try using a tool like Checkup, or something, itll say the same thing because it checks it using the model number and firmware model!)
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Credits: Monsieurtalbot of SinFul iPhone
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Thanks guys, tell me how it goes!

This clearly does not work. I can confirm my conversation with a dev on this issue a while back and Hexane is also right.

The reason why it gives the impression that this fstab mod works is because once after you reboot the phone, you flush the RAM; thus, giving us the added-speed/"snappy" impression people are seeing. This is true of every reboot--not the fstab mod.

After applying this mod to prove it's fallacy, on my iPhone 4 iOS 4.0.2, I ran Geekbench and scored 362--this was a while after toying with some apps. On the second reboot and without launching of any apps, I ran Geekbench, again, it scored a 378.

As far as the iPhone 3GS/4 goes, the baseband runs a check on boot to make sure the kernel doesn't run at a non-intended clock speed.

Save yourselves the trouble and delete this thread before someone ends up restoring their devices.