How to get my text messages?

Okay so I've been out of the country for a month, using a different simcard. And when I put in my UK simcard again, I have no textmessages. And I know 100% that I do have textmessages that has been sent to me when I didn't use my simcard.

So my question is, how do I retrieve them, I have an Iphone 3.

Can I retrieve them?

If you have back up your text messages, you can restore from the backup.

To restore information from a backup, use one of the following methods after connecting your iOS device to the computer with which you normally sync:
1. Right-click (or Control-click) the device and choose Restore from Backup
2. If you have a new phone, you can connect to iTunes and it will prompt to restore from your backup
Solution from Apple.com: http://support.apple.com/.../kb/ht1766

If you have no backup for your data on iPhone, iPhone data recovery software is your last shot! Try this one: https://www.any-data-recovery.com/product/iphone-data-recovery.html
It's easy to use. Just a few clicks you can get all your data back.

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