charging cable
can I use the same charging cable that I use for the S3 for the S7
Yes you can however your Samsung S3 cable WONT quickly charge the S7. Only the charger it comes with charges the S7 quickly. The circular wireless "fast" charger DOESNT charge half as fast as the wall charger, but it came free with my purchase so I cannot complain.
Samsung - Adaptive Fast Charging Wall Charger - White
(2,811)