Sound issues/ Set specific ringtone and DND

[MagicMagdelene]

I'm having trouble with this phone and need help. I have an s10e unlocked, though it says it's a T-Mobile phone on startup (I am not with T-Mobile). I'm also current with all updates (downloaded one today). Couple of issues:

1.  First, I had my DND turned on with my favorites set to break through. It worked initially, but no longer. I can't figure out what changed but my important contacts aren't ringing through. Need this function, since I'm a caregiver and need to be available for emergencies.

2. Can't figure out how to set a specific ringtone for a specific contact. I open the contact, hit "edit", then "view more" and there is no option for ringtone, only the vibration pattern. Tutorials online say I should see an option for ringtone, but it's just not here.

[AndrewL]

@MagicMagdelene: Where did you purchase the S10e from, as if it was purchased second hand then the previous owner may have been with T-Mobile, and bought the device directly through them. Regarding your Do Not Disturb issue, please try heading to Settings > Notifications > Do Not Disturb > Exceptions > Calls, Messages and Conversations > Calls > Favourite Contacts. You may also wish to enable Repeat Callers at this stage, in the event that a contact is unable to reach you, and calls you back within 15 minutes. I'd also recommend opening the Phone app > Tap the 3 dots in the top right > Settings > Block Numbers > Block Unknown/Private Numbers > Off, in case this is a contributing factor. 

To add specific ringtones to certain contacts, try transferring your contacts to the Phone's internal memory. To do this, open the Contacts app > Tap the 3 lines in the top left > Manage Contacts > Import/Export Contacts > Export > From > Choose current location > To > Phone. Once you've completed this step, tap on a contact > Edit > Show More, and check to see if the ringtone option is available to you.