Help/Support SUB_X - on IDA General question

[Elreys 973 iPad Air 10.3.1]

Hi Guys DiDA shmoo,

 

I read all Tuts about IDA hack, sub_x and more i create successfully more tweak, and i have a lot of experience as developer objectiv c# swift, i rod ARM assembly book to understand deeper arm register function and language.

 

To my question: 

If i found a sub_ on IDA i xref and i see that this sub goes anyway, what is the best analytics step to find the Function Call for of this sub_x method?

 

This is was i tried:

 

Set break on address 0xxxxx , read of the LR (Link Register normally the will return the function Address) e.x 0x4567788,

On IDA jump to address : 0x4567788, but unfortunately i dint find the right register with the values. 

 

I forgott to tell you that this address work, in the game but he change only the Value on the visual, the original value are not changed, its this anyway the right way to find the original address;)

 

Thanks Guys

 

PS: Sorry for my but english but im Italian Guys:)