The same is true if you travel overseas and want to use a local SIM card to save money.
The update may happen automatically once you insert the new SIM card.
It’s reasonable — smart, even — to want to know what’s included in an update before downloading it to your i Phone or i Pad.
Unfortunately, the companies don’t make it easy to find out, if at all.
But if not, you can go to Settings About to start the process manually.
Since these updates tend to be smaller in size than major system upgrades, the update process should be faster, so you don’t have to be offline for very long.
There is certainly the potential that an update might end up breaking something or negatively affecting your device’s performance.
We’ve seen this happen a few times with i OS updates.
So I talked with Apple and all four major carriers — AT&T, T-Mobile, Sprint and Verizon — to get more information.
This can include adding support for upgrades made to a carrier’s network or the rollout of new functionality like voice-over-LTE, which promises to deliver better-sounding voice calls. For example, a carrier update was issued after a bug was found on the Verizon i Phone 5s that was causing the phone to use cellular data while connected to a Wi-Fi network.