1) just unplug you Hub3 and plug in the Hub4, you don’t need any of the supplied cables
2) if you Hub3 is still active, then the Hub4 does need to be activated, call:
Equipment activation on 0800 953 9500
Tudor
There are 10 types of people: those who understand binary and those who don't and F people out of 10 who do not understand hexadecimal c1a2a285948293859940d9a49385a2