This would be the best choice for free browsing, cos it does not need any VPN app at all. But, you can only get it once!
HOW TO GET THE FREE MTN 4GB
These tricks are very straightforward. Just follow these:
1. Walk into any mtn shop or service centre.
2. Upgrade your sim to 4g.
3. After successful upgrade, you would be rewarded with free 4gb!
Note that this plan would work well, even in the absence of 4g support on your phone.