Note: If unable to perform reset over Wi Fi, disable option in settings and connect to mobile data.Carrier settings updates let your carrier provider update carrier network and related settings to improve cellular network connectivity and performance.When a carrier setting update is available, you'll be prompted to install it.
You can manually check for and install a carrier settings update with these steps: About and look next to Carrier.
To see additional carrier information, tap the version number.
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If someone on your Sprint Family Locator account gets a new phone but keeps the same number, you don’t have to do a thing.
Once they’ve activated their new phone, you’ll be all set, nothing for you to change.
A carrier reset is almost always necessary if you’re activating a device or if you’re having trouble receiving voice, text, or a data connection.
This reset sends your device’s new information to the network so that you can get service.
If you insert a new SIM card into your i Phone or i Pad, you need to download the carrier settings for your new carrier.
Information about products not manufactured by Apple, or independent websites not controlled or tested by Apple, is provided without recommendation or endorsement.
The wiki How Tech Team also followed the article's instructions and validated that they work. Installing system updates makes your device less vulnerable to viruses and exploits.