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.

Titanium Backup - Titanium Backup is a very old backup app that has been around since the early days of Android. In fact, it's one of the few apps that covers all versions from 1. Read more about Titanium Backup.

SIM Contacts Manager - SIM Contacts Manager app offers features that let you insert your sim card to your mobile phone to manage, edit, add, and delete your contacts right at your fingertips.

oandbackup - Make backups of selected apps on your device and restore from those backups.

X-Transfer - X-Transfer is an app by WebToGo that comes up with features to help you in performing data transfer between your smart devices in a few simple steps.

MIUI Backup - built in backup manager in xiaomi devices