tried factory reset, no joy. Tried with another location, no joy. The seller suggested I return the device as my return period would soon be up, so that's what I've done. Must have got a dud un. Thanks for the posts, I'm a bit reluctant to get another Nexus 7 so might go for a Kindle Fire. Cheers.

Hello everyone, recently purchased a Nexus 7 but I have to virtually sit in front of the Wi-fi Router to get a connection, other devices work from around the house. I wrote  to the supplier ( through Amazon) who asked " DO other devices work well ?" and suggested I reset the device by holding the the power button down for 15 seconds. I am not tech savvy so I would welcome any thoughts on the subject, thanks in advance.