Qualcomm is about to stop using the MSM designation for its chipsets and will switch to SDM. The Snapdragon 835, also known as MSM8998 will be the last SoC with the MSM in its model name. According to a Weibo leakster, the next-gen chipset from Qualcomm will be the Snapdragon 845 and will be dubbed SDM845. The following iterations will also have the SDMxxx tag. The Snapdragon 845 could arrive with the next LG flagship and the 2018 Galaxy S front runner. It is expected to be manufactured by TSMC, instead of Samsung and might have the latest X20 modem that boosts LTE download...
Source: http://www.gsmarena.com/qualcomm_changes_naming_rules_for_snapdragon-news-25585.php