[peterwwillis]

If you can't send DNS packets directly to a remote resolver, do not expect bandwidth or stability for normal applications like a web browser. Use it for something like IMAP/SMTP, or browsing with lynx/links/w3m, or one-shot ssh commands, rsync, git, etc.

[Scoundreller]

Opera Mini mode (where they proxy everything and cut out ads and resize images) might be viable when necessary.

Would a ride-sharing app or navigation work?

I’m guessing there’s too much jitter/lag for a 9.6kbps phone call.