How to decode an SMS which looks like this ...

[aratti]

In your code you use the byte variable "C" but I don't see it declared.

Did you include "MODEDEFS.BAS" in your code?

num var byte[12]

For c=0 to 12 ' you will need 13 bytes here
sum[c+8]=num[c]
next c

How long is your phone number? You have declared an array (num) of 12 bytes but the for/next loop is trying to use 13 bytes!

Also the array sum is declared for 21 and you are attempting to use 22 (you have sum[21]= 13) This is an array of 22 bytes!
Remember that you have to count also the zero.

So adjust both the arrays as per the lenght of your phone number ( if 13 digits then you need 13 in the declaration and 13 in the string numerical. If on the contrary the phone lenght is 12 digits then modify the for/next loop to For c=0 to 11 and put byte array sum var byte[22]


Al.