# Network and signal

URL: https://byshahid.com/blog/iphone-codes/network/
App: Secret Codes: IMEI & Carrier (https://apps.apple.com/us/app/secret-codes-imei-carrier/id6807154322)
Updated: 2026-11-04

> Call waiting, 5G and LTE, network selection, roaming and hotspot settings.

- [*3001#12345#*: Field Test Mode](https://byshahid.com/blog/iphone-field-test-mode/)
- [*#5005*7672#: Check Your SMS Centre Number](https://byshahid.com/blog/check-your-sms-centre-number-star-hash-5005-star-7672-iphone/)
- [*#43#: Check Call Waiting](https://byshahid.com/blog/check-call-waiting-star-hash-43-iphone/)
- [*43#: Turn On Call Waiting](https://byshahid.com/blog/turn-on-call-waiting-star-43-iphone/)
- [#43#: Turn Off Call Waiting](https://byshahid.com/blog/turn-off-call-waiting-hash-43-iphone/)
- [*#33#: Check Call Barring](https://byshahid.com/blog/check-call-barring-star-hash-33-iphone/)
- [Choose Your Network Manually](https://byshahid.com/blog/choose-your-network-manually-iphone/)
- [Switch Between 5G and LTE](https://byshahid.com/blog/switch-between-5g-and-lte-iphone/)
- [Wi-Fi Calling](https://byshahid.com/blog/wi-fi-calling-iphone/)
- [Check For A Carrier Settings Update](https://byshahid.com/blog/check-for-a-carrier-settings-update-iphone/)
- [Reset Network Settings](https://byshahid.com/blog/reset-network-settings-iphone/)
- [Review Cellular Data Usage](https://byshahid.com/blog/review-cellular-data-usage-iphone/)
- [Low Data Mode](https://byshahid.com/blog/low-data-mode-iphone/)
- [Data Roaming](https://byshahid.com/blog/data-roaming-iphone/)
- [Personal Hotspot](https://byshahid.com/blog/personal-hotspot-iphone/)
- [Force A Network Re-Registration](https://byshahid.com/blog/force-a-network-re-registration-iphone/)