Back in September, T-Mobile announced several improvements to its network's infrastructure that would help speed up data transfers significantly. There were two folds to the strategy, 4x4 MIMO and DL-256QAM/UL-64QAM, as well as two devices promised to be compatible with these options first: the Galaxy S7 and S7 Edge.
First, 4x4 MIMO is already available in 319 cities and has the potential to double the data paths between the cell network and phones for better speeds in congested areas. It turns out that 4x4 MIMO was already enabled in the update that rolled out to the T-Mobile Galaxy S7 and S7 Edge back in September, but it wasn't mentioned in the official changelog. Cellular Insights tested out firmware G935TUVU4APIA on the S7 Edge and verified that 4x4 MIMO was working on it.
Second, the 256QAM/64QAM (quadrature amplitude modulation) technology for faster transfers of bits during downloads and uploads, respectively, is already live in most of T-Mobile's network, but it was waiting for devices to support it. The Galaxy S7 and S7 Edge were also promised to get support first and the latest T-Mobile update to both is fulfilling that promise, even though, once again, the changelog doesn't mention that.
OTA update pushed out this morning by T-Mobile US makes Galaxy S7 the first DL-256QAM/UL-64QAM & 4x4 MIMO smartphonehttps://t.co/MMFK7InxR1
— Cellular Insights (@CellularInsight) November 5, 2016
Cellular Insights confirmed it with their own tests, and several users on Reddit are also reporting significant speed improvements in both download and upload speeds on their devices in the same spot. A few aren't seeing any difference, though.
If you have a Galaxy S7 or S7 Edge on T-Mobile, make sure you're on the latest software versions (G935TUVU4APK1 for the S7 Edge and G930TUVU4APK1 for the regular S7) and do a speed test. You might be pleasantly surprised.