what si the different on zte a310 vs a520 on screen size and width ? why some seller sold those case said it's the same size ?

Drop by because of streamyx thread as a user.

Would like to know whether which digi package is similar to digi infinite ?

I wanted to test my area whether it can run on 4G.Which prepaid I should get for testing purpose.Don't really care about number , just for internet.How to check whether our area support 4G+ ?

If really works on 4G ,
1.Can digi using p2p ? need to use vpn to bypass ?
2. How well does the ping response from voip like whatsapp call and etc ?
3. Which router have the best signal or can support 4G ? saw a few mention B618