What kinds of things do you want to view via internet?
MR3420 is working with a USB dongle to provide internet access?

Vivian wrote

What kinds of things do you want to view via internet?
MR3420 is working with a USB dongle to provide internet access?

I would like to view my home DVR security cameras via the internet on my smartphone.
USB Dongle is providing the internet connection via the router.

Figure out IP address and port of your cameras. Open ports on the router. Ensure that IP address under 3G/4G is a public one, otherwise, you have to contact your ISP for help.
http://www.tp-link.com/en/faq-72.html
Note: private IP range:10.0.0.0—10.255.255.255; 172.16.0.0—172.31.255.255; 192.168.0.0—192.168.255.255

Vivian wrote

Figure out IP address and port of your cameras. Open ports on the router. Ensure that IP address under 3G/4G is a public one, otherwise, you have to contact your ISP for help.
http://www.tp-link.com/en/faq-72.html
Note: private IP range:10.0.0.0—10.255.255.255; 172.16.0.0—172.31.255.255; 192.168.0.0—192.168.255.255

Hi Vivian, I got hold of my 3G/4G ISP. They said i had to apply for an unrestricted APN.
Restricted APN is the default setting and they block port forwarding. I got confirmation yesterday that they have changed it now to unrestricted.I just have to do the changes on modem settings for it to take effect. Will try that and see if that works.Will keep you posted.Thanks

Vivian wrote

Figure out IP address and port of your cameras. Open ports on the router. Ensure that IP address under 3G/4G is a public one, otherwise, you have to contact your ISP for help.
http://www.tp-link.com/en/faq-72.html
Note: private IP range:10.0.0.0—10.255.255.255; 172.16.0.0—172.31.255.255; 192.168.0.0—192.168.255.255

HI, From the above IP ranges,it looks like the ISP connection is private.
I will contact ISP today to see what next steps to take. I am also trying to chance the preloaded DNS providers on my DVR to NO-IP ,as it is not listed. I am registered with NO-IP. Unable to add it on DVR. DVR is a chinesse make.I need to change this to get DNS to work .
Thanks