Yep, it's hard to decode the serial numbering they use.
The R30 was not available until mid 2018 and I bought mine a bit later in 2018 with the 160011xx serial number.
I think it was in May 2018 some time when the FCC granted the radios certification.
I've not seen anyone post a serial number of 16000xxx or lower so I assume 16001xxx is the lowest. Then I've only seen one person post a higher serial of 16002xxx so not much difference! The 16002xxx user is
@letarotor himself so he has the newest that we are aware of.
I still think more would be posting about this issue if it's widespread but there's not much regarding any problems with the R30 here or on any of the old Yahoo Groups message boards that are now dead and the new groups.io message boards also does not mention many issues. There are several Icom related groups at groups.io. I'd think at least one of those groups would be full of messages if this problem is widespread.
I feel sorry for Brian (letarotor) if he was just unlucky and ended up with two duds in a row.
It's too bad he didn't record the serial number from the first one he sent back.
Maybe his 'away from his house' test will show that his works fine. Then he has a new challenge figuring out what is causing the issue!
Icom didn't officially announce the release until June 2018 according to this PDF press release they released.