You can use Galaxy S20 ringtone to identify calls from which SIM card, or from which contact without looking at the phone. This Galaxy S20 guide explains how to set and customize Galaxy S20 ringtones for each SIM card (if you are using two SIM cards) without installing any third-party apps, and how to customize ringtone for individual contacts so that you can "hear" who is … [Read more...] about How to customize Galaxy S20 ringtone quickly without using any third-party apps?