I was looking at buying an iphone but they are so expensive but i have found another phone which looks cool...its an unlocked A88 Dual Sim PDA Touch Cell Phone+1GB TF Gift for 5, just wandering if its a good phone? Can we use our old sim card and be on the same plan as now since its unlocked? It has GSM900/1800/1900 MHZ Tri-Band, is that good? Thanks for ur help