i-9100 ATT (non smartphone) APN settings

I have been using the non-smartphone plan for 4 months on my unlocked i9100 SGS2 and I had access to the H+ (3.5g) without any problems.
But since yesterday, I don't have any internet/data access. The thing I don't understand is that I can see on my phone that I'm getting the H+ (the icon is there and the arrows are in color (orange-green))
.
APN: wap.cingular
Proxy: leave blank
Port: leave blank
Username:WAP@CINGULARGPRS.COM
Password:CINGULAR1
Server: leave blank
MMSC: http://mmsc.cingular.com
MMS Proxy: wireless.cingular.com
MMS Port: 80
MCC:310
MNC:410
APN Type: leave blank

^My actual APN settings.

I also tried the default settings - exactly the same result

APN: wap.cingular
Proxy: leave blank
Port: leave blank
Username:WAP@CINGULARGPRS.COM
Password:CINGULAR1
Server: cingulargprs.com
MMSC: http://mmsc.cingular.com
MMS Proxy: wireless.cingular.com
MMS Port: not set
MCC:310
MNC:410
APN Type: default,supl,mms
In most of my apps, instead of getting the usual "No internet connection" I get "Network Error"
Thank you!

Name: Your Network Name (mine is StraightTalk ATT)
APN: att.mvno
Proxy: Not Set
Port: Not Set
User Name: Not Set
Password: Not Set
Server: Not Set
MMSC: [Only registered and activated users can see links. Click Here To Register...]
MMS Proxy: 66.209.11.33
MMS Port: 80
MCC: 310
MNC: 410
Authentication Type: Not Set
APN Type: default,supl,mms
APN Protocol: IPv4
Enable/Disable APN: Check
Bearer: Unspecified

Good Luck

Name: Your Network Name (mine is StraightTalk ATT)
APN: Not Set
Proxy: Not Set
Port: Not Set
Username: Not Set
Password: Not Set
Server: Not Set
MMSC: [Only registered and activated users can see links. Click Here To Register...]
MMS Proxy: 66.209.11.33
MMS Port: 80
MCC:310
MNC:410
Authentication Type: Not Set
APN Type: default,supl,mms

Good Luck