I'm sorry about the issue. Please try the followings:
- To delete all text messages: When you are at the list of messages (open the Messages app icon), tap and hold on any message in the list until the small square boxes appear, then release. Next, tap on the very first square box at the top (this will select all the messages), then tap on the Trash icon (delete option) and confirm.
Please reply at the box below to continue. Thank you,
- After deleting all your text messages with my steps above, then for more security, please open Play Store app icon, then type / search for secure wipe then install the Secure Wipe app and use it to wipe free space.
- And also, install the Cleaner & Booster for Android app in Play Store for cleaning up your phone.
When you are available, please type at the box below, then click on the Send button below to communicate with me, so I can help further. Thank you,
How is it going? Do you still need help with this or with anything else?