I finally got around to figuring out how to get this to work this afternoon and I thought I'd share in case anyone else is looking to get this working as well.
Dell Inspiron 8200
SuSE 8.2 Professional
Kyocera 7135 Smartphone hooked up via COM1: (/dev/ttyS0)
First, in order to use the phone as a modem, you must launch the FaxModem program from the main menu of the phone.
To set up and use the phone as a modem...
Essentially, I went through YAST2 | Network Devices | Modems. It detected an AT modem attached to COM1. Either configure the one it detects or add a new modem and use the following settings:
Modem device : /dev/ttyS0 (although if you have it hooked up to a different COM port, this value will vary)
Dial Prefix : none
Dial mode : Tone
Special Settings : Speaker on - No, Detect Dial Tone - Yes
Details : Baud rate - 115200, Init 1 - ATZ, Init 2 - AT$QCMDR=3, Init 3 - (nothing)
Select Internet Provider
Custom Provider, add USA.
Select "New" and enter information for Verizon Wireless (which is who I go through)
Provider Name : Verizon Wireless
Phone Number : #777
UserName : firstname.lastname@example.org
(where xxx's are replaced with your phone #)
Password : vzw
Dial-on Demand : I said No, but you may want to say Yes to enable this feature
Modify DNS : Yes
Stupid Mode : Yes
Firewall : Yes
Idle timeout : 180
You can leave the IP details alone.
The next page should show you both the new modem (ppp0 on mine) and the new provider (provider0 on mine).
Click Finish and the configuration will be written. If the system asks you if you want to configure mail, choose No if you are simply setting up an Internet connection. I believe this is for KMail if you are using it. I'm not, so I choose simply to abort at that point.
To make the connection, start KInternet (although KInternet wouldn't actually successfully connect, for some reason). Once KInternet is started, open up a shell, change to user root via "su" and then issue the command "wvdial". It should connect and within a few moments, you should be online. Honestly, I haven't done enough testing to be sure that KInternet is even required. It may have just been coincidence on my machine that it worked only when KInternet was running.
I should mention that you must have the "wvdial" application installed before you can run it from the command line.