4g icon always showing on my S6 (But my cellular network is not 4g)
Some countries/carriers, e.g. AT&amp;T and T-Mobile call (DC-)HSPA+ "4G" (while HSPA+ is commonly referred to as "3.5G"), while they call real 4G "4G LTE" or simply "LTE". Using phones or such carrier origin with a HSPA+-capable SIM will display "4G".