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Cinni

Hello,

I have used my Sony Xperia Z in India for 4 months. It worked fine for indian mobile services providers.

Recently, I have moved to USA, and found - my phone does not detect AT & T sim card here.

The same sim card works fine on other phone. But not with my Sony Xperia Z

Please guide me what could be the issue.

Thanks alot

Cinni

Cinni

Just had a talk with Sony Xperia support team and came to know - xperia z bought from indian market will not work in us market as frequency differes and US mobile service providers do not support indian frequency.

My Xperia Z - model c6602 is of no use in US. Its for Indian market only

View solution in original post

Uliwooly

Which version do you have the C6602 or C6603?

btw this subforum is for the Xperia Z1 not the Xperia Z

Don't forget to give Kudos

Uliwooly

For the Xperia Z to work with the big blue

3G

850 / 900 / 2100 - C6603

850 / 900 / 1700 / 1900 / 2100 - C6602

4G Network LTE 800 / 850 / 900 / 1800 / 2100 / 2600 - C6603

USA Carrier Voice Frequencies 3G 4G 3G Technology 4G Technology

AT&T	850 MHz, 1900 MHz	850 MHz, 1900 MHz	700 MHz, 1700/2100 MHz	GSM/HSPA+	LTE
MetroPCS	1700/2100 MHz, 1900 MHz	1700/2100 MHz, 1900 MHz	1700/2100 MHz	CDMA/EVDO	LTE
Sprint	800 MHz, 1900 MHz	1900 MHz	800 MHz, 1900 MHz, 2500 MHz	CDMA/EVDO	WiMAX (2010–present) LTE (2012–present)
T-Mobile USA	1700/2100 MHz, 1900 MHz	1700/2100 MHz, 1900 MHz	1700/2100 MHz	GSM/HSPA+	LTE (2013)
Verizon	850 MHz, 1900 MHz	850 MHz, 1900 MHz	700 MHz, 1700/2100 MHz (Planned)	CDMA/EVDO	LTE [3][4]
U.S. Cellular	800 MHz, 1900 MHz

Don't forget to give Kudos

Uliwooly

Do you have the correct APN settings

settings > more > mobile networks > access point names > menu > add New

Name pta

MMSC: http://mmsc.mobile.att.net

MMS proxy: 80

MCC: 310

MNC: 410

Authentication type: None

APN type: Not set

Bearer: unspecified

Menu > save > restart your phone

Don't forget to give Kudos

Cinni

I did same!

Saved new APN as suggested above, restarted phone. But no luck!

Cinni

I supppose the one i have supports C6602, C6603 and 4G LTE

The AT & T sim card i have runs on on 4G LTE.

Still not getting connected to network.

2G Network	GSM 850 / 900 / 1800 / 1900 - C6602, C6603
3G Network	HSDPA 850 / 900 / 2100 - C6603
	HSDPA 850 / 900 / 1700 / 1900 / 2100 - C6602
4G Network	LTE 800 / 850 / 900 / 1800 / 2100 / 2600 - C6603
SIM	Micro-SIM
Announced	2013, January
Status	Available. Released 2013, February

Cinni

Just had a talk with Sony Xperia support team and came to know - xperia z bought from indian market will not work in us market as frequency differes and US mobile service providers do not support indian frequency.

My Xperia Z - model c6602 is of no use in US. Its for Indian market only

Uliwooly

That doesn't seem right, AT&T use 850 and 1900 for 3G, in some areas both in some others only one or the other, and the C6602 support them, umm quite odd. I have the C6603 but I've seen other users with the C6602 here in the US, use the search bar and find those threads.