Hi
If he has had the TiVo less then 28 days he may be able to send it back under the "love us or your mnoney back" satisfaction guarantee and ask for a V+,however if he is a new TV customer he may not get a V+ as vm i believe stopped giving them out to new customers in spetember or around that time.
Not sure about you swapping yours i doubt it though as the V+ you have will be registered at your address not his obviously.
If i was you i would wait until monday phone 150 if you have a VM phone and try retentions (thinking of leaving us option) in office hours (uk call centre) and see if they can do anything for your grandad,after all its not his fault he cannot get on with TiVo.
By the way welcome to the forum.
