I was checking out YouTube and came across this very informative video that explains a lot of issues about IOS, Android and various devices
The bloke appears to know his stuff and it does explain why some people may be having problems and suggests possible solutions.
I have nothing to do with the channel - just passing on something that may help people understand the issues.
For the record, I use a dedicated Lenovo quad core tab that runs pretty pure Android so don't have any real issues (once I purchased a good quality cable) but his closing comments are food for thought
If a few more people took the time to watch and digest that video there might be a few less questions on this forum - especially if they watched it prior to splashing out some hard earned $$$