There is never and probably wont be tweaks or packages that alter the way the stock iOS works.
Not with factory firmware.
Jailbroken then, but since this is in m/iphone, is there a reason

I haven't i will look into that thanks!iisforiphone said:have you tired confimSMS, doesnt give the cancel feature but it doesn make your confirm sending so you get a second chance to change your mind
Surely i'm not the only one accidently pressing send at the wrong time..