4G

[Javediqbal]

MY Sony Xperia z1 is not supported 4g is any update or something else required to start 4g network on phone

[_alexdon_]

You need a compatible device, SIM and subscription. What variant of Z1 do you have?

[Uliwooly]

@Javediqbal

Only the D5503 it's 4G LTE ready

UMTS HSPA+ 850 (Band V), 9

00 (Band VIII), 1700 (Band IV),

1900 (Band II), 2100 (Band I) MHz

GSM GPRS/EDGE 850, 900, 1800, 1900 MHz

LTE (Bands 1, 2, 3, 4, 5, 7, 8, 20)