In the wake of MWC, Samsung's design, performance and feature advantages on the high end of the market are seriously eroded.
But there's trouble on the low end, too.
For example, Nokia's Lumia 520 phone is a pretty advanced Windows Phone smartphone that should cost less than $185. Upstarts like Huawei and ZTE were showing low-end phones that provide most of the features and functions of high-end phones, but at very low prices.
These are the kinds of phones that are likely to chip away aggressively at Samsung's global market share.
Google decision to go boothless at MWC this year surprised attendees. Last year's Google booth was ginormous and their show presence overwhelming.
Google's Android platform is by far the world's biggest phone operating system. Devices running Android were everywhere at the show.
But there's trouble in paradise, and this was plain to see at MWC. The problem: The marginalization and commoditization of mobile operating systems in general and Android in particular.
On the one hand, some of the very best Android phones, such as the HTC One, are running proprietary user interfaces (like HTC's BlinkFeed, which is similar to Windows Phone 8's Live Tiles interface) and custom apps that define the experience of using the phone.
In general, the custom-built user interfaces created by handset makers are taking the experience further away from the Android experience and the Google revenue model.
One of those alternatives, the Tizen platform, under development by Samsung and Intel, looms large, as Samsung intends to use it to replace Android on some phones and become more like Apple -- a company that sells not only the hardware, but the software and gets a cut of all the downloads.
The threat to Google here is the marginalization and commoditization of the platform OS.
If consumers buy phones based on hardware plus bundled software created by the handset maker -- and if those handset makers do what Amazon does, and redirect buyers away from Google advertising and downloadable content toward their own -- then Google's mobile business will suffer.
Everybody wants a piece of Google's mobile revenue, and they'll go after it by either hijacking Google's own Android or replacing it with a competitor.
As Google loses mindshare, they'll lose market share. And as they lose market share, they'll lose revenue share.