Cellular data

Few Carrier (Cellular Service Provider) does not provide Carrier Settings in full but they offer APN settings for example

• Google FI which has APN to be entered manually as h2g2
• BSNL in India which provides APN pin to be updated manually as bsnlnet
• MTN Ghana which provides APN pin to be updated manually as the internet

Settings > Mobile Data > APN [under Mobile Data APN] enter the APN pin

View and edit your APN settings

If your carrier allows it, you can view your APN settings in one of the following locations: Settings > Cellular > Cellular Data Options > Cellular Network. Settings> Mobile Data > Mobile Data Options > Mobile Data Network.

View and edit your Access Point Name (APN) on your iPhone ...

Use the APN pin based on your carrier. Ask them (Your Carrrier) or search using any search engine.

If you do see the option to enter APN then the only option is given below

Carrier Update (Required): Released by your Cellular Service provider (Carrier Update), affects your Outgoing / Incoming calls, SMS, Data etc..

How to Update Carrier Settings

You can manually check for and install a carrier settings, update with these steps: Make sure your device is connected to a Wi-Fi or cellular network. Tap Settings > General > About. If an update is available, you'll see an option to update your carrier settings.

Update your carrier settings on your iPhone or iPad - Apple Support

If you are unable make a call or receive; If you can't make or receive calls on your iPhone - Apple Support

rimafromtripoli wrote:

I dont have cellular data

i can't make or receive calls

As you have an iPhone 7 also see if this applies→iPhone 7 Repair Program for "No Service" Issues - Apple Support

With most Apple partner carriers the APN settings are downloaded to the phone as a Carrier Settings update, and are not changeable by the user.