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[Openbts-discuss] Fwd: How to disable the 1900 band of Nokia DCT4 phones?
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From: David A. B. <dbu...@jc...> - 2009-04-27 21:30:02
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[My apologies to those who get two copies of this.] The handset's decision to camp to a BTS is made in the handset. The BTS can send signals that can encourage a handset to behave one way or another, but in the end the BTS cannot force a handset to camp, only offer an attractive invitation. The handset will camp to whatever network its SIM is programmed to prefer, which is usually the network of the operator that issued the SIM, followed by its roaming partners. (A locked phone is one that will only accept SIMs from the carrier that locked it.) The only way sure to get the MS to camp to your BTS *automatically* is to be the only BTS available. Here are four ways to do that: (a) Use a single-band handset and be the only BTS in that band, or take a multi-band handset and disable the local bands. That's why, in North America, I usually test in the 900 band and use handsets built or set to operate as 900-only. I have done this with Nokia DCT3s using field test mode. I have done this with Treo650's using the "network" menu. I have seen it done with iPhones. (b) Go somewhere where there is no GSM coverage in any band. That's why we like Burning Man. (Well, there are other reasons to like Burning Man, but that's why we test there. It's a blank slate, so to speak.) (c) Use a SIM card from a carrier who has no roaming agreements with the carriers in your area and then use the network parameters that the SIM wants to see. I haven't tried this myself, but I'm going to get a batch of UK-only Tesco SIMs and try it. (d) Make or program your own SIM and then match your network parameters to it. I haven't tried this either, but it should work. Note that I DO NOT RECOMMEND using the network parameters from your local network and relying on proximity to the test BTS to get a phone to camp to it. First, that is much less reliable than the options listed above. Second, that risks interfering with your local cellular service. If you distract a phone from the real network while someone is making an emergency call, you can find yourself in jail, just to offer an example of the kind of thing that can go wrong. So mimicking AT&T is a BAD IDEA. -- David On Apr 27, 2009, at 1:21 PM, Tachwali, Yahia wrote: > Hello All, > > I just have a small question on the manual operator selection. Is > it possible to get the MS to camp on the openBTS cell automatically > without having to choose the openBTS network manually from the MS? > > Kind regards, > Yahia Tachwali > From: Ken M. Erney [ke...@cr...] > Sent: Monday, April 27, 2009 7:34 AM > To: Jane Chen > Cc: ope...@li... > Subject: Re: [Openbts-discuss] How to disable the 1900 band of > Nokia DCT4 phones? > > Jane, > > I am not sure you can do that from settings or software. You can > usually choose GSM or WCDMA on dual mode/quad band phones but this > wont give you the ability to just disable a single band. If you > know the network you are connecting to, you should be able to set > the phone for manual operator selection and then pick the network > you want...which will lock this to that network. If the phones are > locked to TMobile or ATT, this won't work unless the BTS you > connect to is setup to provide the correct network code. > > Ken > > On Apr 26, 2009, at 10:54 PM, Jane Chen wrote: > >> Hi all, >> >> My phones can only get T-mobile or AT&T, so I would like to >> disable the 1900 band of my Nokia phones (3120 and 6131). >> >> I read the Nokia 3120 user guide and searched through the Internet >> as well. I used "disable, nokia,3120, 1900, bands," as keywords, >> but I have not got any useful information to disable the 1900 >> band. Could you please give me any links or information how to >> disable the 1900 band of Nokia 3120 if it is convenient for you? >> >> >> >> Thank you, >> Jane >> >> >> --------------------------------------------------------------------- >> --------- >> Crystal Reports - New Free Runtime and 30 Day Trial >> Check out the new simplified licensign option that enables unlimited >> royalty-free distribution of the report engine for externally >> facing >> server and web deployment. >> http://p.sf.net/sfu/ >> businessobjects_______________________________________________ >> Openbts-discuss mailing list >> Ope...@li... >> https://lists.sourceforge.net/lists/listinfo/openbts-discuss > > ---------------------------------------------------------------------- > -------- > Crystal Reports - New Free Runtime and 30 Day Trial > Check out the new simplified licensign option that enables unlimited > royalty-free distribution of the report engine for externally > facing > server and web deployment. > http://p.sf.net/sfu/ > businessobjects_______________________________________________ > Openbts-discuss mailing list > Ope...@li... > https://lists.sourceforge.net/lists/listinfo/openbts-discuss David A. Burgess Kestrel Signal Processing, Inc. David A. Burgess Kestrel Signal Processing, Inc. |