You can recover lost text messages on iPhone 6 by following 3 ways. 1. Restore the deleted SMS from iCloud if you have done some backups before. 2. Extract everything from an iTunes Backup if you have synced text messages to iTunes before. For above methods, you can follow the official tutorial for more details: https://support.apple.com/en-us/HT203977 3. If you do not have any backup files and haven't overwritten data, text messages may still stored in a database format. There is still a chance to recover them by some third-party tool like iPhone Data Recovery by directly scan.

As far as I know, there are two ways to solve this problem: 1. You can use iTunes to exit recovery mode. This method will get your iPhone out of Recovery Mode, but will restore the iPad in the process. This will erase everything on the iPhone, but a backup will be created during the Restore process, allowing you to recover your data. (1) Connect your iPad to your computer and run iTunes on your computer. (2) Select your iPhone from the list of buttons at the top of iTunes, then click the "Restore" button. (3) Wait for the backup and restore process to complete, then "restore from backup" in iTunes after the phone has been restored. 2. If you have tried the first method and it didn't work out, you can try some third-party software, like iPhone Data Recovery. You can use the following tutorial to exit recovery mode and recover data: Hope this helps.