vB Easy Archive - HELP | Unable to use Cingular UMTS network on my TyTN in the Washington DC area

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HELP | Unable to use Cingular UMTS network on my TyTN in the Washington DC area
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Posted by: gravejoker

Guys
I am trying to setup my new TyTN to use Cingular 3G/UMTS .. but for some reason .. it doesnt work .. which is a really breaking my heart because as per the 3G coverage map from Cingular my area (Dulles airport/Reston) has 3G coverage.

The details/settings are:
Device: Stock TyTN, HERM200, HT636 series
SIM: around 2 years old, 64K SIM (no 3G indications on it though)
ROMs: Original HTC ROM (07/22)
Bands: Auto, Auto

After soft-resetting with these settings, when the device comes back up, it shows the fabled "U", but then immediately the signal drops to zero and I am not able use voice or data.

TyTN only works when I set it to GSM, GSM (1900+850) + UMTS(1900+850) band settings, which gets me on the GMS network and gives me Edge speeds only (~130-140K). The signal strength is pretty good (3 to 4 bars)

Any thoughts regarding what might be going?

Thanks in advance for the help!!

Posted by: darkinfero

you need to have a 3g card to get 3g speeds trust me

Posted by: darkinfero

switch it at your local store tell you need a 3g card

Posted by: richy240

You don't need a 3G card to use 3G. I promise. I get 700 - 800 kbps speeds using a similar 2G SIM. You may get slightly faster speeds with a 3G SIM (which remains to be seen; I've never read any proof of this), but a 2G SIM works just fine.

Now, the quality of the 3G SIM here in Houston is another story altogether. They still haven't perfected the 2G-to-3G network transition, so I often get dropped calls while transitioning between GSM and UTMS networks. After the first fropped call, I often cannot make another call for minutes afterward.

I had problems similar to your description when I flashed my TyTN with the latest 1.34 Cingular ROM, except my phone would drop the network either about 5 mins after booting the device or immediately when I attempted any sort of data transfer. It took me all of 15 mins to decide to switch back to the default 1.18 HTC ROM. That fixed the problem.

Posted by: richy240

Ok, I'm an idiot. After closer inspection, it would seem that I do in fact have a 3G SIM. Sorry for the confusion. I would edit my previous post, but for some reason that is not an option now.