I am unable to recieve service loading messages on my 6510 service indication works fine. The SL message works fine on a Ericsson T68.
The hex coded message looks like this 01060403b081ea02066a00850a0378797a00850370706169642f3132332f6162632e776d6c0001 and is from Wapforum document WAP-168-ServiceLoad-20010731-a
The part Im uncertain of is the headerpart wich is 01060403b081ea
Nokia WAP Phone 6510 does not support Service Loading (SL) and that is the reason why it doesn't work. 6510 support Service Indication (SI).
You can find from Nokia WAP Phone Characteristic document, which features different Nokia WAP Phones support
>>Nokia WAP Phones