Internet range extenders how exactly do they need to be set up

[big-all]

WhatsApp's data requirements are very low, unless you're talking about video calling. Your 4G connection should be fine for it in most circumstances

dont use cameras except for pictures
any video clips are few and far between perhaps 1 or 2 in a few months and around 10 seconds long

 

[big-all]

thanks for your input much appreciated

 

[big-all]

haven't updated my system since the original post so no updates i can give