Sorry if this is a stupid question but I bought a 8700g on ebay and I currently use a Samsung T509. The 8700 doesnt come with a sim card so would I be able to use my 509 card or do I have to get a new one?

Heck yeah I sol my 7100t to my younger brother I swapem my simcard out of my zw00 an slaped it intom n new 8700g it works just fine the only pain is tranferring information from w device to another you can back that up via dtm then restore it to yor new device. Pin me ana add me to your blackberry messenger if you have anymore questions

Yes