gsm 7 bit decoder

Without going into too much detail, a header is placed within the user data area letting the phone know that this message is part 1 of 3 for example. That is to say that every number and above has the first bit of the byte to be a 1 and every number and below has the first bit of the byte as a 0. This blog post will hopefully answer those questions. We already know the length as it was defined 2 bytes ago as being 10 digits long. Now we need to remove the Most Significant Bits and append then back onto their original byte.

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