Hi Joan,
Yes I currently have the updated modem XB8 (July 7th) - what is strange before the updated to new modem - had my old modem (XB3) where last backup on IPAD was June 27 and was on dual - I had another tech come out again and provide new modem on July 15- worked when he was here - then later that afternoon I tried and it did no work. That night on phone with Apple Support for 3 hours - nothing helped. My devices also switch wifii off and on - never did that before.
I also don't feel comfortable with changing routers myself - splitting channels - I am not tech savvy at all - I work from home and if something happens which would not allow me would be a nightmare.
I truly think this is awful we all have to go through this. I am truly disappointed in APPLE and Xfinity to say the least and just exhausted. We all need to keep back ups going on our devices - I am sure many of us use our devices for work ,etc which is now hindering us to keep important information backed up.
Joan please keep me up to date what you decide- truly appreciate you responding.