As millions of iPhone owners upgrade to the new iOS 10, most are happy with the changes, but a few report their battery is running down faster and some say they are using their data faster.
Philip Steele made the upgrade to iOS 10 last week.
But just days later, "Well, I saw a text from Sprint."
It was an alert: he had just burned through his monthly data in record time.
"Looked at it and saw that I had used up 2 gigs, and wouldn't have any more available until my plan renewed on the second of October."
Philip uses his iPhone as a laptop hotspot, and wonders if that was involved.
But he had seen a recent news report of a Florida woman with an unexplained $9,000 Verizon bill, and wondered if he was part of a new trend.
"That made me concerned. Maybe its the new iOS 10 update, that its actually accelerating the use of data."
Tech blogs say there is no single reason for increased data use these days.
It could be your iPhone update, or it could be your friends are sharing more Facebook videos, or perhaps you are playing too much Pokemon Go!"
Macworld and other tech sites say iOS 10 does not use any more data than previous versions, but your phone's settings may be set up now to use more data.
So it suggests you:
--Disable "WiFi Assist," which puts your phone on the network when WiFi is weak
--Turn off cell data for app updates
--Turn off cell data for apps you rarely use
Philip's glad his carrier alerted him.
"Pretty much Sprint shut me down because I was getting ready to go over and who wants to go over at $50 a gig?"
He's going to double check all his settings now.
As for the woman with the $9,000 dollar bill, Verizon believes her phone was pinging Amazon hundreds of times a day, for some reason.
Bottom line: check your data usage so you don't waste your money.