While the first version of 4G LTE allowed to reach 75 Mbps in maximum downward theoretical speed, the evolutions of the technology already allow to reach 150 Mbps or even 300 Mbps on the latest high-end smartphones and among operators who have already started to deploy these improvements.
Thanks to the aggregation of frequencies, it is possible to gradually increase the bit rates until approaching what will allow the future 5G, namely down bit rates of 1 Gbps. In this race for data speeds, the designer of mobile chips Qualcomm and the equipment manufacturer and manufacturer of smartphones Huawei announced to have carried out tests with compatible terminals 4G LTE Cat 11.
With this specification further advancing LTE-Advanced evolution, they have, with mobile devices carrying a modem SnapDragon LTE, aggregated three frequency bands to generate a bandwidth of 60 MHz and used modulation 256QAM (densifying the quantity of signals transported) to reach downlink speeds of 600 Mbps.
The first terminals LTE Cat 9 (up to 450 Mbps) have started to be offered by operators with compatible network infrastructures, with bandwidths from 55 to 60 MHz, but the use of 256QAM modulation will further improve the user experience in dense areas.