Please tell us some basic information before asking for help: Model Name: Zenfone 8 Firmware Version: 126.96.36.199 Rooted or not: no Frequency of Occurrence: several times a week APP Name & APP Version (If your issue relates to the app): In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc. ======================================== The headline says it all - the ringtone (settings >Sound & vibration ¬ification) resets itself infrequently but several times during the week) to being inaudible. I've missed several important calls which is more than annoying. I have the phone for 9 month now and this issue was there from the word go. I did factory reset the phone- to no avail. Support from ASUS direct or their centers was useless as they only suggested factory reset. I hope sincerely someone can help as this is an excellent phone otherwise - just this problem alone makes me look at contemplating to buy another Android brand.