I had this happen a few weeks ago when my phone crashed without warning. I messaged all my clients using the website to explain I was having phone troubles and let them know I would still be there but wouldn't be able to do an update until I got to a computer. I sent a normal recap at the end of the day and offered to discount their next booking to make up for the lack of pictures/real time updates. They were all very understanding, everyone's shattered a phone before so as long as you keep them updated, it should be okay.