This is a quick guide for how to reflash Fyme OS on Meizu MX4 Ubuntu Edition. Flyme is based on Android with some redesign along with extras. It doesn't ship with Google apps, but those are easily installable.

You can flash Flyme 5.1.12G or 6.1.0G (released recently), both based on Android 5.1. To see what's new in Flyme 6, check out THIS page. Using the steps below, you should receive future Flyme OS updates automatically, so there's no need to reflash anything manually for any OS updates.

The KDE Connect Indicator (fork) PPA maintainer is not available any more, and I was asked to create a new PPA. 

Since I'm a KDE Connect Indicator user myself, I couldn't say no, so I created a new KDE Connect Indicator PPA, which provides packages for Ubuntu 17.04, 16.10 and 16.04 / Linux Mint 18.x.

An alternative to KDE Connect is Pushbullet. While the free version has some limitations and it doesn't offer all the features available with KDE Connect, it does provide options to send files up to 25MB, send messages from your desktop (limited to 100/month in the free version, and a storage cap of 2GB) and most importantly, it can mirror your phone's notifications on the desktop.

Note that Pushbullet requires both the Android device and desktop to be connected to the Internet, but they don't have to be in the same network.

The original KDE Connect Indicator hasn't been updated in about 2 year however, Steeven Lopes forked it, getting it to work with recent Ubuntu versions, while also adding various improvements:

Turtl is a secure, open source Evernote alternative, available for Linux, Windows, Mac, and Android. An iOS version is "coming soon". Firefox and Chrome bookmarking extensions are also available.

The application, which is currently in beta, lets you keep your notes (with Markdown support for the note editor), website bookmarks, passwords, documents, photos, and so on, in a single private place.

The application is free to use but not free and open source software, and it consists of two parts: the server, which you'll have to install on your computer, available for Linux (only deb files available), Windows and Mac OS X, and the mobile app, which runs on Android and iOS.

FrostWire is a free, open source Java downloader, BitTorrent client and media player, which comes with a built-in multi-tracker search (like TPB, Yify, Mininova, etc.) as well as YouTube and SoundCloud search/download support. The application is available for Linux, Windows, Mac OS X and Android.