Samsung SM-G730A is Samsung Galaxy S3 mini that specially designed for AT&T Carrier. The good thing of Galaxy S3 mini for AT&T is that this device is equipped with NFC technology, in which on others version of Galaxy S3 mini (GT-I1819), it wasn’t included. Along with AT&T carrier, this SM-G730A also supports 4G LTE network technology for high speed data connection.
Under AT&T networks, the Galaxy S3 mini works on GSM quad-band 850 / 900 / 1800 / 1900 Mhz, UMTS (HSDPA) tri-band 850 / 1900 / 2100 Mhz and also 4G LTE band 4, 17, 2, 5 Mhz. As the mini version of Galaxy S3, the SM-G730A comes with 4.0 inches display size (smaller than SGS3). The display uses Super AMOLED capacitive touchscreen with 16M color depth and 480 x 800 pixels resolution. It’s about 233 ppi pixel density.