I bought this phone to be a WiFi only music player for use with the Microsoft Groove music service and installed a 128GB MicroSD card for lots of storage. I really couldn't be happier. Once the phone arrived, I installed the "Windows Insider" app and upgraded it to Windows Phone 10 flawlessly. Then I uninstalled just about every app that I could, turned off tons of extraneous settings, turned on battery saver mode, went into storage and set save locations to the SD card, got on my WiFi network, then downloaded tons of music for offline playback from Groove. Once all my music was on, go into airplane mode for maximum battery life! I can't recommend this enough. It has great battery life, is light, has tons of storage, and only cost $30 + $50 for the SD card. Throw in some decent SkullCandy ear buds for $15, and you have a 128GB Microsoft Groove Music iPod equivalent for less than $100. The groove music service is an additional $99/year for unlimited streaming and offline listening. I'm a big fan of several underground genres including industrial, goth, synth/future pop, ebm, ambient, noise, etc. I've compared the availability of underground music in Groove Music with Amazon Prime Music, and Groove has tons more obscure artists, hands down. This phone sounds fantastic, partly because it has the added bonus of a 7-band equalizer in the settings. The equalizer has presets or can be manually set. There is also a virtual surround sound option for headphones. The battery can also be removed and replaced, which is a nice bonus. If you choose to activate the phone with Cricket, it's $40/month for unlimited everything including 4G data. The data speed just drops to 3G after the first 1.5GB of mobile 4G data that you use. Incredible speed, power, battery life, and price. You can't go wrong with this setup!