Mobile build 10158 looks like another step into the right direction
Windows 10 mobile build 1016x is the best candidate for the next Insider Preview roll out
A post at XDA forums reveals info about an unreleased Windows 10 build for phones number 10158. This version is not likely to reach the regular Windows Insiders, according to the same post, as it is intended for internal testing purposes. The good news is that a newer build (1016x) is in the evaluation phase, and may be released through the Fast ring in the next couple of days or sometime next week.
Build 10158 looks like another big step forward in improving the performance and stability of Windows 10 Mobile. XDA members write that this version is faster and smoother than the current Preview build 10149. Other changes include a more polished UI, the removal of the Beta tag from the Store app, transparent Tiles for Microsoft Edge browser and Store, new animation for People Live Tile, and a new version of the Wallet app.
Source: Windows Central