[Acidmrp]

I think it's hard to make the phone not freezing. Because you would have to write
an routine running in background and calling itself by an timer for example, if routine
is finished don't setup the timer at it's end.

The big problem: You want to do this in an AT Command. I don't know what the
phone will do if we just call SendATAnswerStr() while other AT Actions already
finished. Can we call this from any routine? Or do we need some Init?
Maybe use an AT Progress? (Sending some dots)

Do anyone know how to access the Display?


EDIT:

@arsh0r
do we really need this:
iFileSize = lseek(iFileHandler, 0, S_END, &iError);

in every loop? I think the file pointer is increasing with the write routine.
Maybe this will make it little faster.

And the other thing: Why do you search the end of the file? It would be
better to search the start.

- create file if it don't exists
- open
- search start
- LOOP WRITE

because you are appending the data to an file if it already exists so we
don't have an exact memory map, because we don't know the old file size.