Well I don't have a model in mind yet, but I am open to suggestions. I was planning to switch my provider soon from Sprint to Verizon, but I just looked at Cingular and T-Mobile plans and they don't look all that bad (T-Mobile doesn't seem to have very good coverage). I'd like to get a phone that I can connect to the MCU and also use it as my personal cell phone. That would be the cheapest solution, where I would not need to buy a modem. So if you know a good Sprint, Verizon, Cingular, or T-Mobile phone that can take serial commands from an MCU, please let me know. I think I would prefer a Verizon phone just because that's what most of my friends have (free calls). It would also be good if the provider did not charge all that much for data calls. The Siemens phone you mentioned, is that a GSM phone? If so, that means it works with Cingular or T-Mobile, right? Is there a high charge for data calls?
Computer Engineering (BS/MS)
Rochester Institute of Technonolgy