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How to tell if Wi-Fi Assist is actually using too much iPhone data

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There’s a feature on iPhones called Wi-Fi Assist that is a common source of confusion for a lot of users. Wi-Fi Assist helps your iPhone switch to cellular data with your carrier when your local Wi-Fi is too weak to offer fast enough loading speeds.

That sounds risky especially if you have a limited monthly data cap, but most people shouldn’t have to worry about turning Wi-Fi Assist off. Here’s how to check and understand how much data Wi-Fi Assist is actually using.


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Teenager blames Wi-Fi Assist for $2,000 bill as he racks up 144GB of data on his iPhone plan

One person who definitely didn’t read our PSA on Wi-Fi Assist last September is San Francisco teenager Ashton Finegold. CBS News says that he is blaming the feature on a mobile phone bill for $2,021.07 as he racked up 144GB of data.

It turns out Ashton Finegold’s bedroom is one such place with a weak [Wi-Fi] signal. So while he thought he was still connected to his home Wi-Fi while surfing the web in his room, his iPhone was eating up more than 144,000 MB of data.

The piece notes that Finegold did receive a text message warning from his carrier, which he ignored …

Wi-Fi Assist is an iOS 9 feature that automatically uses mobile data when you have a poor Wi-Fi connection. By default, it is switched on – leading to a $5M class action suit against Apple. Apple issued a support document explaining exactly how the feature works in October of last year.

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Apple faces $5M class action suit over iOS 9 Wi-Fi Assist feature using too much data

Apple is now faced with yet another class action lawsuit claiming that the company failed to properly educate or warn users over the potential for iOS 9’s Wi-Fi Assist to use substantial amounts of cellular data. The lawsuit arose after users complained that Wi-Fi Assist resulted in significant overages after going over their data allowance…


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Apple clarifies how Wi-Fi Assist handles cellular data usage in iOS 9

Buried deep in the Cellular section of the Settings app in iOS 9 is a new networking feature called Wi-Fi Assist that lets your iPhone use cellular data over Wi-Fi during poor connectivity. Intended to remedy those times when your iPhone gets stuck trying to load data on a weak Wi-Fi connection due to range or other issues, Wi-Fi Assist raised a concern for many iPhone users on tiered data plans after iOS 9 was released.

The feature is turned on by default, so users could mistakenly eat up expensive data on a weak Wi-Fi network without realizing cellular data was being used. Addressing concerns that have been raised over iOS 9’s Wi-Fi Assist feature, Apple issued a new support document this week that details how the feature handles certain situations (via Six Colors):
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PSA: Keep an eye on your mobile data if you ever use poor-quality WiFi

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If you ever use your iPhone on poor-quality WiFi networks, you may want to check your mobile data usage. As Quartz noted, a new feature introduced with iOS 9 is leading some people to see dramatic increases in their mobile data usage.

Wi-Fi Assist means that iOS recognizes slow WiFi and supplements it with mobile data. Great for ensuring your browsing experience doesn’t suffer, but it can come at a cost, with some users reporting that their iPhone is now using literally gigabytes more mobile data since upgrading. Unless you have unlimited data, that can get expensive.

Wi-Fi Assist is on by default, and rather hidden away in Settings, so here’s how to switch it off … 
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