If you own a legal copy of GTA: San Andreas on iOS and are looking to mod it, or if you are proceeding at your own risk, here is how the process generally works.
If you are serious about mobile GTA multiplayer, you have three superior options: samp ios ipa free
If you still want to proceed, here is the general method used by the community to get these files onto a device without jailbreaking. If you own a legal copy of GTA:
Before proceeding, you must understand the current state of SA-MP on iOS: samp ios ipa free