Centre county Pennsylvania, USA | Looks like Cingular users couldn't use cell phone data service for (reliable) RTK corrections relay even if they were operating in 5 bar area. Copy/paste below is Cingular's use policy for UMTS/HSPDA data service, I think all cell phone service providers have similar "Use Policy", but some don't seem to be aggressively enforcing it, yet !!
"Data Service sessions may only be conducted for the following purposes: (i) Internet browsing; (ii) e-mail; and (iii) corporate intranet access (including access to corporate e-mail, customer relationship management, sales force automation, and field service automation applications). The Services cannot be used with server devices or host computer applications. Prohibited uses include, but are not limited to, telemetry applications, automated data feeds, continuous jpeg file transfers, Web camera posts or broadcasts, other machine-to-machine applications, and voice over IP. These Services are not intended to provide full-time connections, and the Service may be discontinued after a significant period of inactivity or after sessions of excessive usage. "
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RTK corrections signal transmission....
