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GSM or CDMA

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Anonymous

I have been developing for J2ME phoneapps for about 7 years and have found that GSM is supported by many more phones than CDMA. As
others have noted there are a lot of non-standard implemtations on many of these phones. I have found Motoroal to be the most
consistent followed by Nokia. A lot of the phones like Samsung will drive you crazy trying to port a large app that uses CLDC 1.1/
MIDP 2.0 (JSR 118, JSR 139) and any of the 'newer' API's like JSR 82 and 75

Jerome
jliss@viewsonicsinc.com

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Pal Szasz

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I had the best experience with SE, they even implement the Nokia UI api,
and have the same keycodes as Nokia, so porting an application from
Nokia to SE is mainly consists of just installing it and try it :-)
Sometimes you have to add some code to slow down the game ;-)

I don't think Motorola is that consistent, we had a LOT of troubles.
One interesting thing: they just changed the softkey codes from -21 and
- -22 to 21 and 22 (or it was inversly? I'm not sure). Anyway, there are
phones which are pretty compatible, but simply the softkeys don't work.
And there is the V300, which is 99% compatilbe with v525, v600, v500,
etc, except: if the JAD/MF sais the app is MIDP-1, then you have ~40KB
less memory... strange :-)

But in overall you're right, GSM is more supported. For example in
Europe it's hard to find a CDMA operator. A few years ago there was only
one: Zapp mobile (Romania). But they didn't offered too many phones.

In USA, as I heard, CDMA is more popular but there are serious GSM
operators as well.

Jliss-Viewsonics wrote:
> I have been developing for J2ME phoneapps for about 7 years and have found that GSM is supported by many more phones than CDMA. As
> others have noted there are a lot of non-standard implemtations on many of these phones. I have found Motoroal to be the most
> consistent followed by Nokia. A lot of the phones like Samsung will drive you crazy trying to port a large app that uses CLDC 1.1/
> MIDP 2.0 (JSR 118, JSR 139) and any of the 'newer' API's like JSR 82 and 75
>
> Jerome
> jliss@viewsonicsinc.com
>
> ===========================================================================
> To unsubscribe, send email to listserv@java.sun.com and include in the body
> of the message "signoff KVM-INTEREST". For general help, send email to
> listserv@java.sun.com and include in the body of the message "help".
>

- --
Szasz Pal
- ----------------
Space Software Studio
http://www.spacesoftwarestudio.com
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