Android users are facing a significant shift in how they communicate, as the landscape of default messaging apps undergoes a major transition. For many Samsung Galaxy owners, the transition is becoming a necessity rather than a choice, as the longtime Samsung Messages application is set to be discontinued in July 2026 according to Samsung US. This move pushes users toward Google Messages, the recommended alternative for maintaining a consistent and modern messaging experience.
While Google Messages provides a robust foundation—most notably through the integration of Rich Communication Services (RCS)—it has long been criticized for lacking the deep visual personalization found in Samsung’s proprietary software. Until now, users were largely limited to basic bubble color changes, leaving those who enjoy custom backgrounds and personalized aesthetics feeling left behind. However, evidence suggests that Google Messages customization features are finally on the horizon.
Recent discoveries within a beta build of the application reveal that Google is actively developing a more comprehensive theme engine. This update aims to bridge the gap between the streamlined Google experience and the highly customizable environments that Samsung users have grown accustomed to. By introducing a dedicated “Theme UI,” Google is signaling a shift toward a more user-centric design approach that prioritizes personal expression.
For the millions of users migrating from Samsung Messages, these upcoming changes could be the deciding factor in how they perceive the transition. The move to Google Messages is not just about protocol updates like RCS; It’s about ensuring that the “best messaging experience on Android” also feels like a personal space.
Breaking Down the New Theme UI Features
The evidence for these changes comes from specific code strings found in the latest beta version of Google Messages. These strings act as labels for buttons and menus that will eventually appear in the user interface. The presence of these labels suggests a suite of tools that travel far beyond simple color palettes.
According to the beta strings, users may soon be able to access a “Theme Preview” to see how their changes look before applying them. More importantly, the strings indicate a move toward true personalization through the ability to upload personal photos. The labels “Upload photo” and “Your photos” strongly suggest that users will no longer be limited to a preset gallery of images provided by Google.
<string name="custom_theme_add_photos">Upload photo</string>
<string name="custom_theme_your_photos">Your photos</string> <string name="custom_theme_preview">Theme Preview</string>
<string name="custom_theme_title">Theme UI</string>
<string name="custom_theme_custom">Custom</string>
<string name="custom_theme_backgrounds">Backgrounds</string>
<string name="custom_theme_bubble_color">Bubble Color</string>
<string name="custom_theme_apply">Apply</string>
In addition to custom imagery, the “Custom Backgrounds” and “Bubble Color” strings indicate that Google is refining the way users can manipulate the visual contrast and mood of their chat threads. This allows for a level of granularity where a user can match their chat bubble colors to a specific uploaded wallpaper, creating a cohesive visual theme for their conversations.
Why This Matters for Samsung Users
The timing of these developments is critical. As Samsung continues to steer its users toward Google Messages, the loss of Samsung Messages’ customization options has been a primary pain point. Samsung Messages allowed for a high degree of aesthetic control, and for many, the “sterile” look of Google Messages was a deterrent.
By implementing these features, Google is effectively removing one of the last remaining reasons for users to resist the switch. When combined with the functional advantages of RCS—which offers typing indicators, read receipts, and high-resolution media sharing—the addition of a “Theme UI” makes Google Messages a much more competitive and appealing default.
Integration and Ecosystem Synergy
Beyond aesthetics, Google Messages is designed to function as a hub for the broader Galaxy ecosystem. For those using the app on select Samsung devices, the experience extends beyond the smartphone. Google Messages is available on new Galaxy smartwatches running Wear OS Powered by Samsung, allowing users to send and receive 1:1 and group texts over Bluetooth, WiFi, and cellular data via Google Support.
The ability to sync conversations across Galaxy tablets and watches ensures that the messaging experience remains fluid. While We find some limitations for legacy Galaxy tablets and watches—such as the inability to use RCS chats for 1:1 conversations or create new RCS groups—the core functionality remains strong. The upcoming customization features will likely enhance this experience, making the transition across different screen sizes feel more seamless and visually consistent.
The Role of RCS in the Transition
The push toward Google Messages is heavily driven by the adoption of RCS (Rich Communication Services). RCS is intended to replace the aging SMS/MMS standards, bringing Android messaging closer to the feature set of iMessage or WhatsApp. It allows for larger file transfers, better group chat management, and a more reliable connection over data networks.
However, the transition has not been without criticism. Some users have argued that the current implementation of RCS feels proprietary because it is heavily gated to Google Messages on Android devices. By improving the app’s customization and visual appeal, Google is attempting to make the “standard” Android messaging experience more inviting, reducing the reliance on third-party alternatives.
What to Expect Next
While the beta strings provide a clear roadmap of what Google is building, there is no official release date for these specific customization tools. However, industry patterns suggest a potential rollout window. Historically, Google introduces significant new features through “Android Feature Drops,” which are periodic updates that bring new capabilities to existing devices.
If these features are intended for the next Feature Drop, users could see the “Theme UI” arrive within the coming month. Until then, users can continue to use the basic bubble color options currently available in the stable build of the app.
Summary of Expected Customization Changes
| Feature | Current Capability | Expected Beta Capability |
|---|---|---|
| Backgrounds | Limited/System Default | Custom backgrounds & photo uploads |
| Bubble Colors | Basic selection | Advanced “Bubble Color” integration |
| User Photos | Not supported for themes | “Upload photo” and “Your photos” options |
| Interface | Standard Settings | Dedicated “Theme UI” with Preview mode |
For users who have not yet made the switch, the official recommendation from Samsung remains to upgrade to Google Messages to ensure a consistent experience before the July 2026 discontinuation of Samsung Messages as stated by Samsung US.
The next confirmed checkpoint for users will be the upcoming Android Feature Drop, which may either introduce these themes or provide further clarity on the rollout schedule for the “Theme UI.”
Are you planning to switch to Google Messages, or do you prefer the customization of third-party apps? Let us understand your thoughts in the comments below and share this article with your fellow Android users.