To resolve the issue of your text messages not sending while allowing calls and receiving messages, you can follow these step-by-step troubleshooting methods:

1. Check Your Network Connection
Ensure your iPhone has a strong signal and is connected to a mobile network. Try toggling Airplane Mode on and off to reset your connection. If you're using Wi-Fi for iMessage, make sure it's connected properly.

2. Restart Your iPhone
Sometimes, simply restarting your device can resolve many issues. Turn off your iPhone fully, wait a few moments, and turn it back on.

3. Update iOS and Carrier Settings
Check for any available iOS updates or carrier settings updates. Go to Settings > General > Software Update to see if an update is available. For carrier settings, go to Settings > General > About. If there's an update, you will see an option to update your carrier settings.

4. Reset Network Settings
This can help clear any corrupted settings that may affect messaging. Go to Settings > General > Reset > Reset Network Settings. Note that this will erase saved Wi-Fi networks and passwords, so you will need to reconnect afterward.

5. Check Message Settings
Make sure you haven't enabled "Do Not Disturb" (DND) for your messages. You can check this by going to Settings > Focus > Do Not Disturb. Ensure that it's turned off, which might prevent notifications for sent messages.

6. Check for Blocked Contacts
Ensure that the recipient is not on your blocked contacts list. To check, go to Settings > Messages > Blocked Contacts and see if the number you’re trying to message is listed there. If it is, unblock it.

7. Confirm with Your Carrier
Sometimes, the issue could be with your carrier’s service. Contact your mobile carrier to ensure that there are no issues with your account or service that might be preventing messages from being sent.

8. Consider Using iMessage
If you are currently sending messages as SMS, try using iMessage by ensuring that your iMessage is turned on. Go to Settings > Messages and switch on iMessage if it's not active.

9. Contact Apple Support
If none of the above steps work, reaching out to Apple Support might be necessary. They can provide specialized assistance based on your situation.

Following these steps should help you identify and resolve the problem with your outgoing text messages. If the issue persists, a visit to an authorized service provider might be required for hardware checks.

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