How to turn the iPhone 4S off without using the lock screen or assistive touch?

Urgent help needed here, so the iPhone is jailbroken on ios 7.0.4 and it has been perfect for a while now but i recently installed iFIle and that was fine too until today and suddenly it crashed on the iFile screen, Now i could lock it but then i could never unlock it ever again, not even see the screen it was just black, but if i held the home button i could hear siri and still receive phone calls.

Added (1). I meant lock button* i'm sorry

How to remove My3G on Cydia?

I just installed My3G from Cydia source: ihackstore/repo and i want delete it but this dam app badly stuck on my iphone and won't be get away. I can't install the original paid app too,
I'm very glad if you can tell me how to resolve this problem
thanks.
tom

Added (1). Thanks Oyat,
I find the best resolve after try many tricks, this is full information:
first remove the My3G files on device using this the info from this nice video
but i had these errors after it:
1- Cydia sub process error usr/var/lib/dpkg returned error code (100)
2- Sub-process /usr/bin/dpkg returned an error code (1)
3- running debian packager

finally i decide re jailbreak my iphone without restoring because after the last error i was not more able to install or remove anything from Cydia
I re jailbreak my device without restore and its work, ( re jailbreak without restoring device is not recommended but i take the risk ) its worked, i remove completely and install original app.
at this process the jailbreak can't completed but get Cydia re fresh, also evasion icon visible on the screen that could be easily removed with CyDelete,
hope this information helpful.

Bike Race Cheats, Unlock All Bikes?

Is there a way that i can unlock all the bikes in the bike race app for my iphone or android even, i can download it on that if i have too. I've been looking for a bike race cheats cuz i want to unlock the super bike and a few others. I know there was a cheat for bike race but it doesn't work anymore for me and i hadnt used it to unlock all the bikes yet. Anyone got a bike race cheats 2014 tool working right now to do any of this. I can jailbreak my iphone if i have to or use ifunbox cuz i know you have to use that sometimes. Anyway if n e one can direct me somewhere or has any tips for me to unlock all the bikes without having to pay that would be great, thanks.

Taking my iphone 5 to apply the touch has stopped working what will they do?

I have an appointment with apple on Sunday the touch on my iphone5 has stopped working i'm just wondering what they will do?
The phone is under warrenty i have only had it on my contract for like 4 months.
It has 12 months warrenty.
The thing i'm bothered about is the phones got a crack on the screen in the top left corner, the touch recently stopped working, but the cracks been there from like since the 1st two weeks i got the phone like 3 months ago.
they won't try linking the cracked screen and saying this caused the touch to stop working will they?

Making amplifier for for 5 watt speaker?

Okay, so i have a 5 watt speaker that i want to install in my dirt bike helmet and i want to play music with my iphone 5. There's only one problem, if i plug in the speaker straight to my iphone it won't play music loud. I need an amplifier but i can't have anything to big because this speaker and the amp has to fit into my helmet. I also i have no idea what to make the amp out of or what kind of amp i need to buy.

I want to get music from my macbook to my iphone?

But my iphone is synced to another computer and i definetly don't want to lose all my current music when syncing…
It says:" erasind and syncing replaces the contents if this phone with the content of this itunes library!" help! I just want some song from that computer to my iphone(its my new computer)