| Mutiny32 |
10-25-2009 01:59 AM |
Re: Regarding Sprint's TP2's SIM Subsidy/Network Situation
Quote:
Originally Posted by apristel
(Post 1262431)
How does the phone recognize the difference between US GSM and International?
I also read in here that Sprint TP2's are only restricting t-mob and at&t GSM? Is that truly the case?
I would like to get a SIM from a local carrier that is Einstein PCS, they have their own craptastic network, but the rates are low. I don't really need it, but I do want it for cool factor. So if it's only tmob and at&t that is blocked or do the towers here in the US tell the phone it is in the US?
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The phone recognizes the MCC. The Sprint TP2 is blocking based on MCC 310 and 311, possibly others. The MCC is basically a country code for cellular carriers. Base stations advertise this. Something on the Sprint device doesn't even allow Windows Mobile to see those carriers. I tested it with a foreign SIM tonight who has both Tmo US, AT&T, Cincinatti Bell, and others as roaming partners. My phone accepted the SIM, the PIN for it, the contacts, even the MVNO profiles on it. I switched to GSM only mode and it saw nothing. It didn't even see towers. I did a manual network selection and it listed no towers.
It would make sense for HTC to put a condition into the radio portion of the ROM that says if MCC = 310/311, then do not pass to OS. That's probably what's happening with the Sprint phones. As I stated in my other thread about the difference between the RHOD400/RHOD500, VZW and Telus have both stated that they are going the LTE (UMTS/GSM) route, as CDMA2000 is dead in the water after Rev.B. Sprint is going the WiMAX route as it currently stands. Telus is already lighting up some of its UMTS segments. |
