Review: Palm Treo 750
Top message: Dropped Calls by graylion
Replying to: Re: Dropped Calls by JoeDaddy
Re: Dropped Calls
When UMTS is engaged the phone is evidently using 1900 MHz for voice which is unfortunate because HSDPA uses 1900 MHz for download and 850 MHz for upload (or is it the other way around?). I dare suggest that voice calls when UMTS is engaged always use 1900 MHz. Cingular's voice network on 1900 MHz inherited from AT&T positively stinks.
It seems like it would be fixable through software.
Note that if you have T-Mobile you don't have these intermittent problems--it uses 1900 MHz all the time (and also EGPRS all the time), so it stinks all the time at least in my area.
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