extra content-type appended, why ?

[habibs]

Hi, i am developing midlet that communicates with rest service.
On request headers i specify Content-type: application/json;charset=utf-8. It works fine with other phones but Nokia 6230, 6230i devices add extra content type to existing one and i get "Content-type: text/plain , application/json;charset=utf-8" on server side. Can someone comment on this issue ?
Thanks in advance.

[grahamhughes]

Are you sure this is being added by the phone, and not by the network? Are you testing all devices on the same network, using the same GPRS Access Point? Can you test with the 6230 on a different network?

Graham.

[habibs]

Hi Graham, thanks for reply. As per your suggestion i have tested my app on 2 different networks, the result is the same for Nokia 6230 .
Any suggestions ?
Thanks again.