Here is a simple trick; but this code may not work on all handsets. Open phone dial, press *#*#4636#*#*. This will open a menu for phone information. Here you can set your preferred network type to ‘LTE only’ for 4G. When ‘LTE’ or ‘4G’ is displayed next to network signal, run the ping test. If both IPV4 and IPV6 tests are passed, then you are on 4G network. But do remember, keeping the mobile on LTE only mode may make it inaccessible where there is no 4G network from your operator. You can also try setting your network on ‘LTE’ mode under mobile network in general settings. But most mobile handsets provide only ‘preferred’ or ‘auto’ mode for 4G/3G and 2G and, in that case, you will have no choice.
Inside story of the National Stock Exchange’s amazing success, leading to hubris, regulatory capture and algo scam

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