htc desire hd intead of s e satio

[vectradam]

i have a sony ericsson satio on orange that i am totally fed up with ( i have 18 months left on my orange contract ) . if i bought an htc desire hd which was someones unwanted orange upgrade ,would i just be able to insert my sim card and everything would be ok ? would i then be allowed to sell my satio to a phone recycler ?

[RADUMERDAN]

If you payd the phone totaly u can sell it to a phone recycler and u will be able to insert the sim and use it in a htc desire hd if it's carrier free or u can unlock it