United States
HSDPA
LTE

AT&T APN settings for Cat S31

      AT&T   Cat S31   Android

Cat S31 is compatible with AT&T HSDPA and AT&T LTE.

To configure AT&T APN settings with Cat S31 follow below steps. Cat S31 maximum data transter speed with AT&T is 102/51 Mbps.

AT&T Internet & MMS APN settings

Go to Settings Connections Mobile networks Access Point Names in your Cat S31 app drawer.

Add a new APN by pressing  on right top corner. If device has already set values for AT&T 2 for any fields below leave them as they are (MCC, MNC etc). Change other fields as below.

Name: AT&T 2
APN: phone
Proxy:
Port:
Username:
Password:
Server:
MMSC: http://mmsc.mobile.att.net/
MMS proxy: proxy.mobile.att.net
MMS port: 80
MCC: 310
MNC: 410
Authentication type: None
APN type: default,mms,supl,hipri,fota
APN protocol: IPv4
APN roaming protocol: IPv4
Bearer: LTE
APN PPP phone number: Not set

Please be sure to set Bearer to LTE to enjoy high data transfer speeds with AT&T. Now restart your Cat S31 to apply new AT&T APN settings.

If the above AT&T Internet & MMS APN settings do not work on your S31, make below changes to AT&T Internet & MMS APN settings to get Cingular 380 ATT on your Cat S31.

APNproxy
MMSChttp://mmsc.cingular.com/
MMS proxywireless.cingular.com
MMS portblank
APN typedefault,supl,mms
APN protocolIPv4

If the above AT&T Internet & MMS APN settings too do not work on your S31, make below changes to AT&T Internet & MMS APN settings to get ATT Phone on your Cat S31.

MMSChttp://mmsc.mobile.att.net
APN typedefault,mms,supl,fota
APN protocolIPv4

If the above AT&T Internet & MMS APN settings too do not work on your S31, make below changes to AT&T Internet & MMS APN settings to get ATT WAP on your Cat S31.

APNwap.cingular
MMSChttp://mmsc.cingular.com/
MMS proxywireless.cingular.com
MMS portblank
APN typedefault,supl,mms
APN protocolIPv4

If the above AT&T Internet & MMS APN settings too do not work on your S31, make below changes to AT&T Internet & MMS APN settings to get For unlocked non AT&T devices on your Cat S31.

APNNXTGENPHONE
MMSChttp://mmsc.mobile.att.net
APN typedefault,mms,supl,hipri

If the above AT&T Internet & MMS APN settings too do not work on your S31, make below changes to AT&T Internet & MMS APN settings to get Net 10 ATT 4G LTE on your Cat S31.

APNtfdata
MMSChttp://mmsc.mobile.att.net
APN typedefault,mms,supl,hipri
Authentication typePAP

If the above AT&T Internet & MMS APN settings too do not work on your S31, make below changes to AT&T Internet & MMS APN settings to get Net 10 via AT&T on your Cat S31.

APNRESELLER
MMSChttp://mmsc.mobile.att.net
APN typedefault,mms,supl
APN protocolIPv4

If the above AT&T Internet & MMS APN settings too do not work on your S31, make below changes to AT&T Internet & MMS APN settings to get Net 10 via AT&T Tracfone on your Cat S31.

APNtftdata
MMSChttp://mmsc.mobile.att.net
APN typedefault,mms,supl,hipri
Authentication typePAP
APN protocolIPv4

Straight Talk for AT&T APN Settings

Go to Settings Connections Mobile networks Access Point Names in your Cat S31 app drawer.

Add a new APN by pressing  on right top corner. If device has already set values for AT&T 2 for any fields below leave them as they are (MCC, MNC etc). Change other fields as below.

Name: AT&T 2
APN: tfdata
Proxy:
Port:
Username:
Password:
Server:
MMSC: http://mms-tf.net
MMS proxy: mms3.tracfone.com
MMS port: 80
MCC: 310
MNC: 410
Authentication type: None
APN type:
APN protocol: IPv4
APN roaming protocol: IPv4
Bearer: LTE
APN PPP phone number: Not set

Please be sure to set Bearer to LTE to enjoy high data transfer speeds with AT&T. Now restart your Cat S31 to apply new AT&T APN settings.

For Cat S31, when you type AT&T APN settings, make sure you enter APN settings in correct case. For example, if you are entering AT&T Internet & MMS APN settings make sure you enter APN as phone and not as PHONE or Phone. If entering Straight Talk for AT&T APN Settings above to your Cat S31, APN should be entered as tfdata and not as TFDATA or Tfdata.

AT&T MCC-MNC values

310-380
310-410

Cat S31 compatibility with AT&T

Cat S31 is compatible with below network frequencies of AT&T. S31 has variants EU and USA.

3G
HSDPAEU850 MHz, 1900 MHz
4G
LTEEUBand 2 1900 MHz, Band 5 850 MHz*
  USABand 12 700 MHz, Band 17 700 MHz
Band 4 1700/2100 MHz, Band 2 1900 MHz, Band 5 850 MHz*
*These frequencies of AT&T may not have countrywide coverage for Cat S31.

Explain Cat S31 compatibility with AT&T

Cat S31 has modal variants EU and USA.

AT&T 3G APN with Cat S31

EU

Cat S31 EU supports AT&T 3G on HSDPA 850 MHz and 1900 MHz.

AT&T 4G LTE APN with Cat S31

Compatibility of Cat S31 with AT&T 4G depends on the modal variants EU and USA.

EU

Cat S31 EU supports AT&T 4G on LTE Band 2 1900 MHz and Band 5 850 MHz only in some areas of United States.

USA

Cat S31 USA supports AT&T 4G on LTE Band 12 700 MHz and Band 17 700 MHz.
It will also support AT&T 4G on LTE Band 4 1700/2100 MHz, Band 2 1900 MHz and Band 5 850 MHz only in some areas of United States.

Overall compatibililty of Cat S31 with AT&T is 100%. The compatibility of Cat S31 with AT&T, or the AT&T network support on Cat S31 we have explained here is only a technical specification match between Cat S31 and AT&T network. Even Cat S31 is listed as compatible here, AT&T network can still disallow (sometimes) Cat S31 in their network using IMEI ranges. Therefore, this only explains if AT&T allows Cat S31 in their network, whether Cat S31 will work properly or not, in which bands Cat S31 will work on AT&T and the network performance between AT&T and Cat S31. To check if Cat S31 is really allowed in AT&T network please contact AT&T support. Do not use this website to decide to buy Cat S31 to use on AT&T.

Max download & upload speeds on AT&T 4G for Cat S31 per LTE band

Band 2 1900EU 102 Mbps 51 Mbps
Band 5 850EU 102 Mbps 51 Mbps
Band 2 1900USA 102 Mbps 51 Mbps
Band 4 1700USA 102 Mbps 51 Mbps
Band 5 850USA 102 Mbps 51 Mbps

Cat S31 network specifications

OS Android 7.0 (Nougat)
Network bands GSM / HSPA / LTE
Speed HSPA, LTE Cat4 150/50 Mbps
Network frequencies GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only)
HSDPA 850 / 900 / 1900 / 2100 - EU
LTE band 1(2100), 2(1900), 3(1800), 5(850), 7(2600), 8(900), 20(800) - EU
LTE band 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 12(700), 17(700) - USA
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