If so, introduce your iPhone to LSCameraExtender — a jailbreak tweak that can add hardware rotation lock functionality and more…
In addition to the rotation lock function, LSCameraExtender allows one to switch between mute/rotation functions right from the comforts of your Lock screen.
Instead of showing the camera icon when you double press your Home button, you have the option of displaying either the mute/unmute button or rotation lock/unlock button instead.
If you’re someone who often needs access to the rotation lock, then I think this is money well spent; it works just as advertised.
What do you think?