If your new xFOB won`t pair up with your existing xHUB and your xHUB is a few years old it is a good chance that your xHUB is an older Gen 1 version and not compatible with your new xFOB.
To verify which version of the MOB+ you have, refer to the picture below:
Keywords:
GEN1 GEN2 Gen1 Gen2 pair cannot