I understand what you're saying, but I've tried to contact Motorola, but I'm not getting a response. I want to update my device, which is my property. I paid for it and would pay for the upgrade, but they're not responding. I don't want to make any profit from the upgrade, just update my device. You say the upgrade is linked to the serial number. I know that's not the case, and any update works on any device, but you have to know how to do it. I'm not a regular Tetra user. Motorola, as always, security through obscurity, then cry when the TEA breaks. Anyway, thank you very much for the help. I don't want to cause more controversy.