Set a vpn to apn from at&t to straight talk - AT&T Cell Phones

Don't mess with the vpn' this is for vertial private network. Shut the phone down remove the sim and replace it then reboot.

Straight Talk APN Settings iPhone 5 5S Step by Step Configuration

That should do it.

you must do a hard resset of your device .

aftr that you download hotspotshield or tigers vpn like apn from your p[lay store , hope your problem will solved regards

zeeshan

Virginia
it is best if you contact straight talk support for apn settings.
Mark
moto

It is best if you contact Straight Talk for APN settings.
Mark
Mo

Straight Talk AT&T APN Name ATT 4G LTE APN tfdata Proxy proxy.mobile.att.net Port Username Password Server MMSC http://mmsc.mobile.att.net MMS Proxy proxy.mobile.att.net MMS Port MCC MNC Authentication Type PAP APN Type default,mms,supl,hipri APN Protocol IPv4

There are different types of APN set up for Straight Talk. My recommendation is that you add more APN from Straight Talk and select each one to troubleshoot. See, believe it or not, there different APN for different smartphone. You just need to select the right one.
Try this setting here if it's different from the one you have.
http://apn.gishan.net/settings/500_11_straight_talk_apn_settings_for_sony_xperia_z.php

AT&T phone on Straight Talk (sprint)? Unfortunately, AT&T uses GSM which is not compatible withSprint's CDMA technology.
Straight talk runs on the Sprint network, same as Boost and Tracphone. Although some phones are the same, some only work on certain networks.

Go to settings > Connectivity > Network Connections > and click "Create" on the bottom of the display.

Then you can enter the settings you were told.

A video for you if you're still confused
https://www.youtube.com/watch?v=AqXf4OgUnuU

Here are the settings I found over the internet. Take a look at it. But I am not sure the service provider is the same though. You better enter the things you've been told by your service provider

Settings : https://bestmvno.com/apn-settings/straight-talk-wireless-apn-settings/