I was using Google Maps on my phone before it was cool. My little prototype Python application, Pyhole, still gets some use despite the fact that shortly after I got it working Google released their own Google Local Mobile. Why? Google’s client doesn’t work with T-Mobile. At all. Not to mention the cheap “t-zones” plan I’m on, which blocks almost all destination ports.
Well, apparently it is in fact possible to get unlimited Google Maps on T-Mobile’s $5/month “t-zones” data plan after all:
- Use the phone’s web browser to start installing GLM. The Google server will detect the phone’s model, and point it to a particular .jad file
- Download a copy of the .jad, using a URL scraped from the HTTP proxy logs
- Replace ServerAddress: http://google.com/glm/mmap with something like ServerAddress: http://proxy.example.com:993/glm/mmap
- Set up a reverse proxy from that URL back to the original Google URL. I used Apache’s mod_rewrite and mod_proxy.
The .jad file also has some juicy-looking parameters for tuning the UI and the cache sizes. I’m still not sure how useful these are, but I’d love to use more of my phone’s 512MB flash to store map tiles.