Avtex 'Smart' TVs

I have had several Avtex TVs and really rate them for the quality of the tuner and picture quality.  I recently purchased one of their 'Smart' TVs where previously had the ones with the built in DVD players and have been rather disappointed although the picture quality and reception is as good as ever.  I pair my TV via my iPhone using 'Personal Hotspot' which works fine but it doesn't recognise the password for a second time which is a pain every time you log on.  The only way I have found to lessen the pain is to change the iPhone password to something easy to remember.  Apparently this is a problem unique to iPhone.
The other problem I discovered over the weekend was that when I selected 'ITV X', for the first time, it said 'not supported'.  Has anybody else had any problems with these TVs or is it just me ?

Bill