HTC One E8 - Manual (Page 120)

Backing up your text messages
Keep important text messages by backing them up to the phone storage. You can
easily restore backed up text messages after you've deleted them from your message
list.
Text messages in the secure box and blocked messages will not be backed up. To
include such messages to your backup, move them first to the general message
box.
1. Open the Messages app.
2. Tap > Back up/Restore SMS > Back up > Back up SMS.
3. To help protect your data, set a password for your backup. Be sure to
remember this password. You'll need to enter it again when restoring messages.
If you don't need a password, select Do not password protect this backup.
4. Enter a name for your backup file, and then tap OK.
Backing up text messages by email
You need to set up your email account in the Mail app.
1. Open the Messages app.
2. Tap > Back up/Restore SMS.
3. Tap Back up > Back up SMS via mail.
4. To help protect your data, set a password for your backup. Be sure to
remember this password. You'll need to enter it again when restoring messages.
If you don't need a password, select Do not password protect this backup.
5. Enter your email address.
6. Compose your email message, and then send it.
Restoring text messages
1. Open the Messages app.
2. Tap > Back up/Restore SMS > Restore.
3. Choose how you want to restore the messages, and tap Next.
4. Tap the backup to import.
5. Enter the password you've set for this backup. If you didn't set a password,
select This backup file is not password protected.
6. Tap OK.
To restore text messages that were backed up via email, open the email message with
the backup file attachment from the Mail app. Tap the attachment to download it first,
120 Sync, backup, and reset