ONLY if the handset has been unlocked from any network.
Any brand name, quality SD card will function well in a Samsung Galaxy S3.
You can purchase sim network pin for Samsung Galaxy S3 from any vendors online like Unlock-Zone.com
Yes, you can share your SIM card between two separate Samsung devices, like the Galaxy S3 and Galaxy Note, but not simultaneously. You would need to physically swap the SIM card between the two phones each time you want to use it in a different device. Alternatively, consider using a dual SIM phone or a mobile hotspot if you need connectivity on both devices simultaneously.
The Samsung Galaxy S3 has a micro SD card slot. This can give the device up to 64 gigabytes of extra memory.
Yes
To root a Galaxy S3, see the related link below.
No, the Galaxy S3 does not have a built in HDMI port.
No, The Galaxy S3 Does not have an HDMI port built in.
S3.
Nope! It's smaller than the S3.
I would get the Galaxy S3.