Hi jessmull,
As I understand it, your phone cannot connect to your cellular provider after updating it recently. I would use the troubleshooting for the following article:
If you see No Service in the status bar of your iPhone or iPad
Follow these steps, testing after each.
- Tap Settings > Enable Airplane Mode, wait five seconds, then turn off airplane mode.
- Restart your device.
- Remove the SIM card. If the SIM card is damaged, worn, or bent, or if it's too big or small for the SIM tray, contact your carrier for a new one. Then reinsert the SIM card.
- Check for a carrier-settings update: Connect to a Wi-Fi network, tap Settings > General > About, and install any available carrier-settings updates. If you can't connect to Wi-Fi, connect your device to a computer that has iTunes.
- Update your iPhone to the latest version of iOS.
- Reset network settings by tapping Settings > General > Reset > Reset Network Settings. This will reset all network settings, including Bluetooth pairing records, Wi-Fi passwords, VPN, and APN settings.
- Contact your carrier to check for any network or account issues.
- Restore your iPhone.
Thank you for using Apple Support Communities.
Take care,
Sterling