> "I noticed many people say they're lucky to get ~15 Mbps on 4G and I'm confused, why? Is it just congestion or is there some difference in the towers/implemen

> "I noticed many people say they're lucky to get ~15 Mbps on 4G and I'm confused, why? Is it just congestion or is there some difference in the towers/implementation?" It can depend on the network, the device, congestion levels, and location. Some networks are notoriously bandwidth-constrained (ahem Three UK) and will always be prone to bad 4G speeds. Some networks have added capacity on more exotic 4G bands that are only supported by relatively recent devices. If you're connected to a macro site in a major city it probably has fibre backhaul with plenty of bandwidth available, but if you're connected to a small edge cell it may have radio backhaul with less capacity available. And newer devices will support things like carrier aggregation and higher levels of MIMO that get faster speeds. Interesting site showing how the UK mobile frequency is allocated here: https://pedroc.co.uk/content/uk-commercial-mobile-spectrum https://pedroc.co.uk/content/uk-commercial-mobile-spectrum Note that only fairly new devices will support the more exotic bands like 32/38/40 (and, of course, 5G).