Re REVVLRY, in being sure to have a suitable ROM available you really want the device codename. If you could get the vendor to confirm that it was "lake" then that is a match with Info about Motorola Moto G7 Plus - lake. The supported models listed on that page are
- XT1965-2
- XT1965-3
- XT1965-6
- XT1965-T
Other models are not supported
For device codename: [HOWTO] Find device codename. Here is the xda forum search link for some extra reading ! Search results for query: revvlry | XDA Forums.
About the MNC, @larrytellef, there is quite an involved thread where some of the vagaries of mnc (and in USA) are explored here Problems Sending/Receiving MMS and Group Messages