On Android smartphones, go to settings > Network settings > mobile network . It should give you a dropdown menu of mobile standards such as 2G, 3G or LTE (4G). If you don’t see 4G or LTE, then your smartphone doesn’t support the standard.
Read moreWhat is difference between 2G 3G and 4G?
The speed increases and the technology used to achieve that speed also changes. For eg, 1G offers 2.4 kbps, 2G offers 64 Kbps and is based on GSM, 3G offers 144 kbps-2 mbps whereas 4G offers 100 Mbps – 1 Gbps and is based on LTE technology .
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