APPLE IPHONE 6 Has there been a problem that causes, HIGH DATA USAGE and high bills?

APPLE IPHONE 6 Has there been a problem that causes, HIGH DATA USAGE and high bills? - 1

Added (1). We were traveling for an extended period internationally. I finally had to suspend data on my phone and buy and international Sim-Card.
I remember seeing an article yesterday about a problem with the new IPHONE 6 hardware that showed out as HIGH DATA USAGE, that was ultimately charged to the user's plan. I'm starting to search about this before changing my sim-card back to the US card.

If anything try turning off Wi-Fi Assist as well as switching off data for certain apps.

If you were travelling & had roaming enabled that would likely be the cause. Not exclusive the iPhones by the way. Roaming brings high rates no matter what which is why it is usually recommended that you turn that off and/or use Airplane Mode while abroad.

Data usage is entirely dependent on your use. If you're connected to the net and are not using Wi-Fi, you're going to be incurring costs.

Wi-Fi Assist is a feature that uses the cellular network as a backup for spotty Wi-Fi coverage. It can cause a problem if you (e.g.) use the phone for entertainment at home but there are places where the Wi-Fi could cut out unexpectedly. The cellular will kick in and you will be charged the data rate.

Review your cellular settings and turn off Data Roaming, Personal Hotspot, apps that you don't need away from home, and Wi-Fi Assist.

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