on 05-01-2019 23:32
Ottabox cases while good can block or muffle mics or speakers. I used to have an ottabox myself on an iPhone 3GS & had to remove due to this type of interference
on 07-01-2019 08:27
Hi all - thanks for all your posts - very helpfull. I'm going to try another cheap case for a few days - if not I'll get the phone changed. I had the same issues when 80 miles from home on Friday so I'm dont think its the network. Either the case or a dodgy mic. Thanks again - and for the laugh about mental stuff!