I had the VicModem, but don’t recall how fast it was. It was often take. From me as a form of punishment. I’d say it was in the locked drawer more often than connected to the computer.
I think it was 300 baud. I couldn't afford it, so followed the schematics to figure out how to connect a military surplus acoustic coupler modem at 110 baud. I didn't know any better, so I thought it was fantastic. Still, a few months later I got a good job and upgraded to an Apple//c clone and a 1200 baud modem.
My first modem was 110 baud acoustic coupler modem that I got from military surplus. I couldn't afford the modem Commodore sold for the VIC-20, so I figured out how to wire this thing in.
I didn't really do all that much with it, because not too much later I got a better job so upgraded to a Laser whatever clone of the Apple//c and a 1200 baud modem.
My first was 28.8 Hayes but was limited to 9800 cause of Telxon audiocopler. I also had a USR PCMCIA card that was 56k(? My memory is slipping cause of long covid) and somehow that was able to connect faster through Telxon audiocopler.
My brother had an acoustic coupled 300 baud modem for his C64, but that stuff was off limits to me. My first was a 2400 baud on ISA card, I bought for the family IBM XT Clone when I was maybe 13, I came up with the money with a hustle. I bought an old lionel train set at a garage sale with $20, sold it to a train shop for $100 (they probably screwed me over). It was my first pc component install, I remember setting the dip switches for the IRQ channel.