Trouble-shooting a Samsung Phone

[Steven Feil]

Is there a test that can be preformed to determine if a cell phone is
a AT-mode compatible phone?

I recently purchased a Samsung SGH-C225 phone and cable (both Serial
and USB). the phone has WAP Internet over GPRS capability, but I have
not been able to use it connect my computer to the Internet. After
reading up on Linux/GPRS it is my understanding that phones that allow
computer/GPRS connections use a modified AT command set.

When I connect an AT-mode phone to the serial port and run minicom
should the phone respond similar to the way a modem does? For
instance, if I were to send "at<enter>" should the phone respond with
"OK"? Also, do AT-mode phones generally implement ate0 and ate1 the
same way Hayes compatible modems do?

I tried testing it by downloading the T-Mobile software on a windows
98 box. I tried using the serial and USB cables, but the software said
that it did not detect an AT compatible phone.

I thought it might be a bad cable, but I discovered that doing the
following steps will cause the phone to send some data. Turn the phone
off, connect the phone via the serial cable, start minicom, press the
power button. The phone does not turn on, it just says charging and
sends the following data to the computer.

000000 16 16 fe ff cb af 9c 93 16 43 68 69 70 20 30 3a    .........Chip 0:
000016 20 70 61 67 65 20 6d 6f 64 65 20 65 6e 61 62 6c     page mode enabl
000032 65 64 16 43 68 69 70 20 31 3a 20 70 61 67 65 20    ed.Chip 1: page 
000048 6d 6f 64 65 20 65 6e 61 62 6c 65 64 16 03 7c fb    mode enabled..|.
000064 ff ff fe 16 03 7c 92 ff ff fa 16 04 7c 16 4c 7c    .....|......|.L|
[snip]
001296 20 70 61 74 74 65 72 6e 20 30 78 61 62 62 38 0a     pattern 0xabb8.
001312 4e 56 4d 3a 20 73 69 7a 65 20 6f 66 20 4d 4d 49    NVM: size of MMI
001328 20 4e 56 4d 20 3d 20 33 39 39 33 32 20 62 79 74     NVM = 39932 byt
001344 65 73 16 09 3c 98 f0 07 98 16 09 3c 98 f0 07 98    es..<......<....
[snip]

Since some of the text is legible I can only assume that the data
cable works. I just don't know what the phone is trying to do.

I've tried searching Usenet for the Samsung C225 but I found almost
nothing. I think the phone must be too new. It seams that cell phone
companies don't believe in tried and true phones, that just want to
sell you a new model. Any suggesting before I just go to Ebay?