GSM Modem With Phone

Make sure your provider (mobile phone) allows using your phone as a modem, a lot providers have blocked it or charges a lot for it.
Altough it isn't a answer, I hope this helps

..... phone as modem is not what im trying to do... That is through teh data line, im trying to use it as a Dial up modem, so like through the GSM line.. (cell phone) not GPRS (data)/UMTS. That is the exact trick to not have to pay exorbitant roaming data fee's. Instead pay for minutes used which is much cheaper and yes i know it wont be BLAzing fast internet, but at the same time enough to check emails etc...

i gues another quesiton is, is there anyway to use GPRS but not get billed through a phone carrier. I want to use telestial or cellularabroad for the roaming sim card, (but their data rates are RIDICULOUS). Is there anyway for me to make a dial up modem at home (like with win server 2003) and have the GPRS settings set to that line (would it get charged how etc...) over GPRS? GSM? i want to basically tunnel data through my server at home (which si hooked to a voip account) but not sure how to do it and or the logistics.. Thanks!

As an initial answer to your question; you can make your GSM phone establish a circuit switched connection (which is what I think you're after) not a packet switched connection by using the ATD command just as you do with a "normal" modem.  Packet switched AT commands are different, e.g. to establish a PDP context.  You can try this by using something like HyperTerminal.  Connect your phone to your computer, type ATZ and enter to reset the modem and confirm that you have comms from the PC to the GSM phone (after setting up HyperTerminal's settings to use the GSM modem) and then type ATD555... etc for the other modem's number and enter, this will establish a data connection to your modem.  A GSM phone that supports a Hayes compatible command set will simply look like a normal modem to the PC software.  So if the Application software (or connection manager) is issuing ATD, then the GSM modem will establish a circuit switched data connection.

so like can windows mobile blackberry; and iphone style take at commands?

also this might be kind of gutsy lol but is there anyway to do this on the phone (especially windows mobile). forexample hav like iap email and hav it check every 30 mins with this style gsm modem (using at commands on phone and dialing data every 30 or so??? thanks

>>so like can windows mobile blackberry; and iphone style take at commands?

yes they can all use AT commands

>>also this might be kind of gutsy lol but is there anyway to do this on the phone (especially windows mobile). forexample hav like iap email and hav it check every 30 mins with this style gsm modem (using at commands on phone and dialing data every 30 or so??? thanks

so you're not wanting to use a PC, just the mobile phone itself?  AT commands are used for communication between a PC and a modem (typically) which is why I mentioned them in my comment.  you would not use them if you are *not* going to connect a PC to your GSM modem.  most phones would not provide an AT commands interface on the phone itself, they would typically provide a programmers interface to be able to dial, hangup calls, etc that would be different from the AT command set.  if you're not a programmer and just a user then you should be able to simply set up a data account on windows mobile, i'm not as familiar with windows mobile as i am with sonyericsson phones so i'll have a look at what settings you need for this and post it here....

ok but like u said earlier im not trying to use "data" and get charged for GPRS. With the modem option and AT commands it appears i can use it like a dial up modem and only get billed for minutes not GPRS usage. The whole point of this endeavor is to use data by only using minutes( IE over GSM). So i see what you are talking about with the computer setup like AT commands & the phone will think its dialing a # wheras in reality the phone is dialing data and will come through as minutes but really using data. On the mobile side (i think windows mobile is the most programmable to start with), but basically taking this concept to the next level on the phone. I have a BB, Windows mobile, VZW brew, and Java phones (no symbian or ericsson yet), and moto one too actually. So basically every 30 mins it "calls" the data line and email updates on the phone. That is the first step i guess doesnt really matter the platform as eventually this concept can be ported theoretically to all phones (in theory) and or ill hire a programmer in that field to port for me etc..

possible or not?

>>So i see what you are talking about with the computer setup like AT commands & the phone will think its dialing a # wheras in reality the phone is dialing data and will come through as minutes but really using data.

Yes thats correct, by using the AT command ATD<number>, will cause your mobile to send data through a circuit switched data call and you will not be billed for GPRS data.

>>That is the first step i guess doesnt really matter the platform as eventually this concept can be ported theoretically to all phones (in theory) and or ill hire a programmer in that field to port for me etc..

For the mobile side, like I mentioned, you won't use AT commands but can use the appropriate programmers API if you need to do something that the phone does not already support through its UI.  For example, on Windows Mobile, a connection can be created through the "Settings > Connections" menu.  Here you can select "Cellular Line" or "Cellular (GPRS)" when creating a new connection.  The first option will create a circuit switched data connection (e.g. if used to check email, browsing, etc) which will not result in GPRS charges, the second option (cellular gprs) will create a packet switched data connection which will result in GPRS charges.  SonyEricsson phones also support this type of setup except that it is referred to "Dial-up" and "Data" on the phone instead of "Cellular Line" and "Cellular (GPRS) and I'm pretty sure that your other mobile platforms will have similar terminology and support creating a circuit switched data connection on the phone itself.

really? i always thought that it would dial data no matter what on a phone especially windows mobile. Wether you say data line or cellular network... i mean i dont think it matters, it will always go for the dataline correct? (maybe im crazy?)

>>really? i always thought that it would dial data no matter what on a phone especially windows mobile. Wether you say data line or cellular network... i mean i dont think it matters, it will always go for the dataline correct? (maybe im crazy?)

no you're not crazy ;-) but i'm quite sure about this, the phone will dial a circuit switched data connection *or* use a packet switched data connection depending upon how it is configured.  the phone does not always use GPRS as you mention above.

you can quite easily tell what type of connection will be created by the configuration parameters that are being asked for when you configure the connection on your phone and the key configuration parameter is that for a dial-up connection (circuit switched data no GPRS) you must enter a phone numbr of your service provider whereas for a packet switched GPRS connection you must enter whats called an APN (access point name).  this is how you can tell what type of connection will be created.

So for Windows Mobile, if you select a "Cellular Line" account, you will be prompted for a phone number and when you use this account a circuit switched data connection will be setup (no GPRS).  If you use "Cellular GPRS" then you will be prompted to enter an APN and a GPRS packet switched data connection will be set up when this account is used.

Ok, so I had a Nokia that would do this like 10 years ago. This feature seemingly disappeared as data plans emerged. So the phone had a driver to make it show up in windows as a modem in the control panel). Then you would dial up to AOL through cellular by telling it to use the phone as a default modem.  However ultimately it is up to the phone providers to create the OS drivers to use the phone as a dial up networking device and not a data modem. I think tethering is the only viable solution these days which will use your data plan. With the advent of unlimited minutes I doubt the cell companies will go for a phone that can be used as a DUN device. Good luck.

well that is why im saying windows mobile. with teh SDK, once its ported for one device it will work on all the devices..

but logic chopper//./

i mean if i create a new connection and dial #777 that is that ilke the trigger to turn on data?

i mean if i dial 123345789 and that is the AOL # or W/e, i will only get billed minutes. Im pretty sure it still uses data (GPRS) unless there is a way to disable that in windows mobile entireley to only use the phoneline? (anyone)

also connecting as a modem, im pretty sure that with windows mobile u can do the AT commands bryanheath1975. (and symbin, and BB). So i just have to figure out that..

im talking the principle to dial over hte phoneline (because yea, it wont be 3G speeds) but it will be decent...

for example when you want to acess the VPN on the device, you type in a number.(phoneline # of VPN). Your telling me that that does not use GPRS? (maybe i dont know)?

i thought that all data connections or data related information was to only use GPRS (because on my EVDO device for example CDMA, whenever i dial out it still has the EV Icon on, does not switch to 1X mode?)?

because like i said earlier i only want to be billed minutes not GPRS charges

anybody know?

not fully an answer but a good start