Web Page Not Available on StraightTalk Android ZTE I have a StraightTalk ZTE Merit, and the browser keeps on saying "web page not available". 

Data enabled and Data roaming are both checked under Mobile network settings. For some reason, it will not let me edit the APN settings.

I cannot use any internet-based apps. 

This is the third day it has been like this. 

Any help would be great.

Some troubleshooting results:


Cellular network is AT&amp;T, MVNO is StraightTalk.
Voice/Text still works.
No installation of apps prior to the issue
Have cleared the Browser's cookies and cache
It has worked on previous occasion
Disabling data roaming did not seem to help
Does not work over Wifi
APN is set to:

Name is WAP. 

APN is att.mnvo
Proxy is proxy.mnvo.tracfone.com
Port is 80
MMSC is mmsc.cingular.com 
MMMS proxy is proxy.tracfone.com
MMS port is 80
MCC is 310
MNC is 410
Authentication type is none
APN type is default,mms,supl

Am suspecting the proxy within the APN setting, could be the fault, or that the service provider has changed something somewhere.



OP was advised to check with their cellular network's web-site to see if there's a page somewhere, (it would require registering details such as name/email/number) and perhaps a button to send the APN details via SMS.
Proxy.mvno.tracfone.com  make sure that the letter P is on upper case
and this is an old apn settings 
your internet is slow on this kind of apn
use the current LTE one