Another reason to dislike T-Mobile (customer experience)
However, the phone doesn't allow applications to do network stuff by default; you have to grant access to an application for that purpose. Unfortunately, T-Mobile has disabled the option to grant network access to applications. Clearly T-Mobile just wants to restrict people to only using the craptacular network stuff they deem appropriate for mobile use, rather than allowing them to actually make use of their network access.
I have a feeling when my contract is up I will be switching to a pay-as-you-go service. Unfortunately, T-Mobile is the only one with PAYG rates which make sense, and no useful data service whatsoever (you can only access T-Zones, which is little more than a ringtone purchase portal at this point). AT&T supposedly has data service on PAYG but they're completely unclear on the details, and their PAYG voice rates are confusing and byzantine.
1:57 PM I found unbranding instructions which should make it so that you can run any Java app without restrictions.
Comments
If you just want to add data access to an ordinary cellphone, T-Mobile has $6/mo for unlimited web access. However, I doubt that the Amazon marketplace interface is very accessible from a cellphone.
For data-oriented cellphones, you can get a T-Mobile Sidekick for $300ish or a Wing for $150 (with new contract), and the data service on those is $20/month on top of voice service, or pay-as-you-go with $30/month for unlimited data + $.15/minute for voice (although that's only available on the Sidekick, not on the Wing). AT&T and Sprint also have lots of data-oriented smartphones (iPhone, Blackberry, Q, Treo, etc.), but their data plans are a lot more expensive than T-Mobile's (and of course their voice plans are a better value than T-Mobile for high minute usage but for normal non-teenaged human beings, T-Mobile still seems to be the best deal).
http://www.howardforums.com/archive/topic/1119842-1.html
http://groups.google.com/group/Google-Maps-for-mobile/browse_thread/thread/1e98edd19d021cb0
http://groups.google.com/group/Google-Maps-for-mobile/browse_thread/thread/e36b39c6a3c2b846/565ec20773e02ec2
http://www.google.com/search?q=nokia+5300+%22application+access+set
I wish T-Mobile had PAYG data worth mention. Argh.
Also, on the "pick your plan" side they don't say whether it's possible to add more minutes should you go over. Though that wouldn't be necessary anyway, since 200 minutes per month which roll over (for the next two months, it looks like) I'd very quickly get to the point that I always have around 600 minutes available at any given time. Of course that plan isn't much cheaper than what I'm doing already, and the data service would very quickly add up a lot (and for unlimited it'd cost more than what I have now), although the unrestricted data might make it worthwhile.
-bill
-bill