How to backup contacts and sms messages from HTC One M8s
We used PhoneCopy.com service for this guideline. Using it, your can backup your contacts from your HTC One M8s easily. The whole backup, including the settings, can be done in several minutes.
Download PhoneCopy for Android to your Android phone, which you can download free of charge. After downloading and installation, go through following steps.
Run the app and create new account. If you already have an account choose "sign on".
To allow correct functionality of PhoneCopy application we will kindly ask you to confirm access permissions for it.
When you confirm access to contacts you can set which "contacts databases" you want to backup.
If you also want to back up your SMS, enable access to the SMS in the next step.
After enabling media access, you can set up media backup (photos and videos).
Getting media from your old phone
If you want to download photos and videos from your previous phone (which was synchronized with PhoneCopy.com) you can select them like its shown in the image below. Then start the Synchronization using the Synchronize button.
Now you have all your contacts backed up on PhoneCopy and you can edit all your contacts in your online account. If you lose your phone or the stored data, or if you just run out of battery, you can see your contacts online.
Some additional tips:
On your online account, you will see full history of your contacts, as well as the data that you've deleted in between the synchronizations. You can find them in an archive from where you can restore them. And if this is still not enough of a backup for you, you can download a CSV file, that you can store in your computer.