IOS 6.1.2 - major lag since "upgrade".

I have the same problem MissStress, also most button presses act as if I have either held down the button or double tapped it? For example most presses of home key result in Siri appearing. Finally, today my phone has started crashing, lines accross screen and then restarting over and over again. I have been on iOS 6.1.2 for some time now, yet this has just started happening!

Same here. My iPhone 4S was working perfectly - fast, not buggy and battery life wasn't half bad. Ever since iOS 6.1.2 my 4S has been painfully slow. I've 'hard' shutdown apps and rebooted a couple times but that only seems to fix it for a short period. Once I get 2 - 3 apps open it starts acting up again. I also notice the interaction of apps lagging which causes Siri to chime in... *le sigh*

I would love to see a solution on this question as I too am experiencing serious lagg with my iPhone4 since updating to iOS 6.1.2. It's absolutely brutal!!! I am not able to upgrade yet so I'm stuck with a phone that is almost useless for anything other than just calls. *huge sigh*

Dont worry people!!

Since my issue has now developed further, meaning the phone does nothing except turn itself on and off whilst showing the apple logo, I no longer have to worry about laggy typing!!!

So glad I made the switch to Apple.....