BEWARE. I had a landline call this morning, supposedly from talktalk. Very convincing stating that my speed was slow and they needed to send me a new router - free of charge, which kept my interest. I was logged into their site which was very official with talktalk logos etc. It showed my current internet speed and what the new speed would be.
He said the router would be delivered by Royal Mail and asked what actual time I would like delivery. This made me slightly wary as I did not think Royal Mail delivered to an actual time slot. He then said that whilst the router was free, I would have to pay £3 for the postage and asked for my card number. Alarm bells sounded and I rung off. He made 9 attempts to 'phone me back which I ignored. He kept messaging me on the computer which I then turned off. I spoke to talktalk and yes, it was a con.
Saved just in time, but be careful, he was so very convincing.