Let's take a look on how to setup a brand new RFinder B1 when it first arrives. We will insert a SIM card, boot the device, and associate my Google account to it. Then we will make sure the RFinder Repeater Directory app is up-to-date.
Purchase links:
https://www.gigaparts.com/rfinder-b1-ht-radio-android-dmr-and-fm.html
https://rfinder.net