Reply to myself...... Thank you, thank you, thank you chersgroupie!!!! Turning the WiFi off worked and the update finished in about 5 minutes on 4G!!! Note: at the start of update my instructions were: plug in if not full battery and use WiFi!!!!! Hard to explain to your 3 year old why they can't have their tablet and you've done what you were instructed to do!!! I pay too much a month for this kind of preventable aggravation!!!