What are some alternatives?
When comparing X-Transfer and SMS Backup, you can also consider the following products
Save contacts - Save contacts app provides features through which users can select the desired data to create the backup in a variety of different formats.
SMS Backup+ - Backup Android SMS, MMS and call log to Gmail / Gcal / IMAP - jberkel/sms-backup-plus
My Contacts by Captain Tushar - My Contacts is an app by Captain Tushar that comes up with features to help you in managing your contacts list so you can effortlessly delete or edit existing contacts.
SMS Backup & Restore - Simple Android app that backs up and restores your phone's text messages, and call logs too
Contacts VCF - Contacts VCF app enables users to import contacts to the phone’s internal storage or to other storage devices to backup them.
SMS Backup Android - SMS Backup Android is a free Android application which allows users to backup and restore SMS...