Help lost my 3G

[allankeston]

I have installed the radio to 1.41.00.10 but my 3G or U signal has gone and i cant make 3g calls, help what do i do? My phone is a HTC TyTn

[chrisjasper]

First read here: http://wiki.xda-developers.com/index.php?pagename=HTC_Hermes

Then try here:
http://www.mrvanx.org/cms/

[bazzah]

Can you explain what you did do to upgrade? Did you upgrade your rom as well?

[champ8242]

I have quite the same. Please check your IMEI number, compare number sticker underneath the battery with *#06#. In my case they are not the same so I can't connect with the data access anymore. I upgraded to radio 1.41.00.10 and upgraded ROM as well.

[Stateless]

I have installed the radio to 1.41.00.10 but my 3G or U signal has gone and i cant make 3g calls, help what do i do? My phone is a HTC TyTn

I have the same problem. I have downgraded the radio rom to 1.40.30.00 but the problem remains. The IMEI number is right. I don't know what I can do...

[phoneguy 4567]

Hi,

I have some questions regarding the IMEI #. My first question is where is the IMEI # stored and why would upgrading a radio rom change it, I would assume that even if a radio rom was extracted from a rom upgrade package it would not contain IMEI information because it is meant to be put on many devices that have different IMEI numbers? My second question is what do the last two digits of the IMEI stand for? I notice that typing the code above shows me the same number as the sticker under the battery, but this number is two digits longer then the number on the box and device info. hardware screen.

Thanks

[pof]

where is the IMEI # stored
on radio chipset.

why would upgrading a radio rom change it
It doesn't. IMEI will be always the same. check it on device information. If you check it by *#06# the IMEI is only the first 15 digit.

I would assume that even if a radio rom was extracted from a rom upgrade package it would not contain IMEI information because it is meant to be put on many devices that have different IMEI numbers?
That's right.
You would clone the IMEI only if you read the whole Qualcomm chip and write it back on another qualcomm (this would require take the chip out of the mainboard, and solder it again...). When you flash radio you only flash around 14Mb, the flash on qualcomm is around 32Mb. The IMEI is never flashed.

My second question is what do the last two digits of the IMEI stand for?
No idea :confused:

[cenes]

So has anyone solved this problem? My 3g stopped workig after upgrading to radio 1.5. It has signal but cannot answer or make calls. It works in gsm tough. Before I had radio 1.46 and everything worked perfectly. I tried to flash many radio roms but none of them worked...

Any help?

Thanks.

[cenes]

So has anyone solved this problem? My 3g stopped workig after upgrading to radio 1.5. It has signal but cannot answer or make calls. It works in gsm tough. Before I had radio 1.46 and everything worked perfectly. I tried to flash many radio roms but none of them worked...

Any help?

Thanks.

Solved it.:)
Well, i've read the wiki but i wanted to believe that changing my radio back to the one that worked would do. In fact it doesn't. My SIM card is very old but has always worked in my hermes (TyTn). I inserted a more recent SIM and my 3g was back, inserted mine again and nothing, so the problem was obviously my SIM card...
But as a computer science engeneer I would like to know why changing the radio back wouldn't do the trick... does anyone know?:confused:

Thanks!