hi m8,
when you download ota you get manufacturers software for you reciever,
the latest for you st 550 is v70.this is to operate your stb.
if you patch the stb you will be able to open scambled channels
without a card or cam.so it will save you money, to patch the stb you will
need a null modem cable from pc to stb, when you download the patch it has all info with the patch, give it a go, i find it works great and faster
chn changes than a cam, if you have problems ie:how to load the members will always help you,







