Bob? He's your uncle. Was the speaker British? The phrase "Bob's your uncle" is a BrE phrase which roughly means "you're all set" or "it's as simple as that" or "everything will be fine/have a positive outcome" and often given at the end of a set of instructions to denote the successful end of a process. (Directions to the bank) Go straight to the next corner, turn left, walk to the end of the street , turn right and (Bob's your uncle.) ( you will find the bank there)

Hi, Bob is a name that is popularly used when choosing a name for something random. Other names like this are Fred, Tom, and and Jim. I think the tech support people were just naming your device for fun and personifying the device.