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      2.5 When your iPad is tethered, it shows the Personal Hotspot icon in the status bar.

      If you have a cellular iPad, you can use it as a Personal Hotspot if your data plan allows for Internet tethering. Tap Settings, tap Cellular Data, tap Personal Hotspot, and then tap the Allow Others to Join switch to On.

Working with Cellular-Enabled iPads

      Some iPad models come with a cellular chip and antenna that enable those tablets to connect to a cellular network. The big advantage here is that you can use your tablet online even when there’s no Wi-Fi within miles of your location. As long as you’re within the cellular network’s coverage area, you can send and receive email, surf the web, map a location, and perform all your other favorite online activities. The one disadvantage is that cellular connections aren’t free. You’ll need a data plan from your favorite (if that’s the right word) cellular provider.

      Tracking cellular data usage

      Having a data plan with a cellular provider means never having to worry about getting access to the network. However, unless you’re paying for unlimited access (lucky you!), you should be worrying about going over whatever maximum amount of data usage your plan provides per month. That’s because going over your data max means you start paying through the nose for each megabyte, and you can run up a hefty bill in no time.

      To avoid that, keep track of your cellular data usage by following these steps:

      Shutting off the LTE antenna

      LTE cellular connections are fast, but they use a lot of battery power because the LTE antenna is constantly scanning for an LTE signal — even if you’re on a Wi-Fi network. If your iPad battery is running low, you can switch to the slower — but lower-powered — 3G cellular antenna by following these steps:

      Preventing your iPad from using cellular data

      If you’re bumping up against the monthly ceiling of your iPad’s cellular data plan, you’ll want to be careful not to exceed your cap because that can get expensive in a hurry. If you don’t trust yourself (or anyone who might have access to your iPad), you can just shut off your iPad’s access to cellular data. Here are the steps to follow:

      Controlling app access to cellular data

      Preventing your iPad from using any cellular data, as I describe in the previous section, is a drastic move, particularly if you know that a particular high-bandwidth app (I’m looking at you, YouTube!) is causing most of the trouble. In that case, you can configure your iPad to disable access to cellular data app-by-app. Here’s how:

      Disabling data roaming

      Data roaming lets you surf the web, send and receive email, exchange text messages, and perform all the usual iPad activities while you’re outside of your usual cellular coverage area (and not on Wi-Fi, of course). It can be expensive, especially if your iPad runs up huge roaming bills by performing background tasks such as checking email.

To avoid these hidden charges, follow these steps to disable data roaming when you don’t need it:

      Switching to Low Data Mode

      If your cellular data usage is inching perilously close to your plan’s maximum, switch to Low Data Mode, which tells iPadOS to stop performing tasks such as automatic updates and photo syncing. Here are the steps to follow to switch to Low Data Mode:

Activating Airplane Mode

      When you’re flying in a commercial airplane, wireless signals are almost always disallowed. That’s fine with you because your iPad has tons of features and apps that don’t require a wireless connection. However, your iPad still broadcasts wireless signals even when you’re not using Wi-Fi, Bluetooth, or the cellular network. You could turn off these signals manually, but an easier way is to put your iPad into Airplane Mode, which disables your iPad’s components that receive and transmit wireless

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