[LeoPanthera]

There was briefly a thing called HSCSD ("high-speed circuit switched data"), which allowed for 14.4k per circuit, and you could make two simultaneous connections to get 28.8k. It was basically ISDN over GSM.

But you paid per minute (twice as much for 28k) and it was swiftly killed off by GPRS.

[joecool1029]

>There was briefly a thing called HSCSD

That was never deployed commercially in the US, it tied up too many channels. I was able to use CSD on T-Mobile and AT&T Wireless back in the day.

Worked well enough during unlimited nights and weekends to get on IRC.

[snuxoll]

Used this way back in the day when we got rid of our landline phone (this was around 2000), used my Kyocera phone as a modem to dial into our Earthlink service. Since we had unlimited night and weekend calling we primarily used the internet around then, oh boy was downloading Windows NT SP6 back then fun.