If you've ever juggled two SIM cards on a Samsung Galaxy phone, you know the drill: swapping between lines for data, calls, or texts isn't exactly seamless. You're constantly diving into settings, tapping through menus, and second-guessing which SIM is actually active. For frequent travelers, dual-line professionals, or anyone managing multiple carriers, it's a friction point that adds up fast. But Samsung's upcoming One UI 8.5 update is about to change that—and if you're a power user who depends on reliable multi-SIM management, this is one update worth paying attention to.
Samsung has been testing One UI 8.5 through a series of beta releases for the Galaxy S25 series, and the latest builds reveal a significant overhaul to how dual-SIM and eSIM users interact with their devices. The fourth beta, rolling out in South Korea, India, Germany, the UK, and the US, brings a unified dual-SIM network icon to the status bar, replacing the previous two-icon setup. This 1.48GB update also includes the February 5, 2026 security patch and addresses multiple bugs, from lock screen clock positioning to Bluetooth headset call switching issues. Beyond visual refinements, One UI 8.5 is expected to debut alongside the Galaxy S26 series in early 2026, bringing these improvements to a wider audience.
Why multi-SIM management has been such a headache
Managing two active SIMs on Android has historically required manual intervention at every turn. Unlike iOS, which introduced streamlined dual-SIM controls years ago, stock Android—and by extension, Samsung's One UI—has lagged in offering quick, intuitive toggles for switching between lines. Currently, switching your active data SIM requires navigating to Settings → Network & internet → SIMs, a multi-step process that's impractical when you're on the move. Custom Android skins like One UI and Oxygen OS have incorporated Quick Settings toggles for some time, but even those implementations have been inconsistent. For users who frequently cross borders, manage work and personal lines, or rely on carrier-specific data plans, this lack of fluidity is more than an inconvenience—it's a barrier to seamless connectivity.
The core issue isn't just about toggling data; it's about visibility and control. When both SIM cards are active, One UI 8 currently displays two separate network signal icons in the status bar, cluttering the interface and making it harder to parse which line is actually connected. Over 67% of multi-device eSIM users report experiencing profile conflicts or data allocation issues during international transitions, highlighting how current implementations fall short for power users. Samsung's approach in One UI 8.5 directly addresses these pain points by consolidating signal indicators and streamlining SIM management workflows.
What's actually changing in One UI 8.5
The most immediately visible upgrade is the unified dual-SIM network icon. Instead of two separate signal indicators, One UI 8.5 displays a single icon that shows reception status for both SIMs, similar to how iOS has handled dual-SIM displays for years. This change saves space in the status bar and makes the UI look more polished, eliminating visual clutter while still providing at-a-glance network information. The primary indicator reflects the network signal for SIM1, with secondary SIM status integrated into the same icon.
Beyond aesthetics, One UI 8.5 expands the Now Bar—Samsung's live notification feature—to include Audio broadcast and Commute from Google. While not directly SIM-related, these additions demonstrate Samsung's broader push toward real-time, contextual information delivery. The fourth beta also introduces a Direct Voicemail feature, allowing users to send calls to voicemail automatically or manually, with real-time text transcripts available in the Phone app. This feature works independently of carriers, since voicemail is recorded directly on the phone, similar to iOS 17's Live Voicemail.
For users managing dual SIMs, the SIM card manager in One UI 8.5 offers more granular control. You can access it via Settings → Connections → SIM card manager, where you can set preferred SIM cards for calls, text messages, and mobile data. Auto data switching, introduced in Android 12, allows the device to temporarily use a secondary SIM if the primary one has poor coverage, and Android 14 enabled automatic data and call switching by default. One UI 8.5 builds on these foundations, making SIM switching less manual and more intelligent.
How this compares to other Android implementations
Samsung isn't the only Android manufacturer addressing multi-SIM pain points, but its approach with One UI 8.5 is notably comprehensive. Stock Android has been developing a Quick Settings tile for switching data SIMs, though it's unclear which upcoming release will include this feature. Custom ROMs have offered these toggles for years, but Samsung's integration into One UI 8.5 brings it to a mainstream flagship lineup with polish and consistency.
Apple's iOS displays dual-SIM network reception statuses in the same unified way, and some may say Samsung has copied Apple. However, Samsung's implementation goes further in some respects. One UI 7 allows location-triggered eSIM switching, and Samsung's Smart Network Switch feature provides automatic failover. The Galaxy S25 series supports up to 10 stored eSIM profiles with 2 active simultaneously, offering flexibility that rivals or exceeds competitors.
For travelers and professionals, these differences matter. eSIM profiles are device-locked and cannot be transferred between devices, so managing multiple profiles across phones, tablets, and wearables requires intentional architecture. Samsung's approach in One UI 8.5, combined with its hardware capabilities, positions Galaxy devices as strong contenders for users who need robust multi-SIM management.
What this means for your daily workflow
If you're a frequent traveler, the unified SIM icon and improved switching logic mean less time fumbling through settings and more confidence that your device is using the optimal network. Auto data switching ensures calls and SMS of the out-of-coverage SIM work uninterrupted using the mobile data of the second SIM, which is critical when crossing borders or moving between regions with varying carrier coverage. To enable this, go to Settings → Connections → SIM card manager → Auto data switching, and turn on Wi-Fi Calling for both SIMs.
For professionals managing work and personal lines, you can customize SIM cards by changing their icon and name, making it easier to differentiate at a glance. You can also set different ringtones and call backgrounds for each SIM, so you immediately know which line is ringing. Dual SIM calling allows you to choose which SIM to use when making a call by selecting one of the call buttons, and you can enable "Ask always" if you prefer to switch between the two SIM cards.
These aren't just convenience features—they're workflow optimizations that reduce cognitive load and minimize errors. When activating profiles across multiple devices simultaneously, sequence matters: activate your primary smartphone first, wait 10-15 minutes, then activate secondary devices like tablets or laptops. This staggered approach prevents carrier systems from flagging unusual activity, ensuring smoother activation and fewer headaches.
Getting ready for the stable release
One UI 8.5 is currently in beta, but it will launch in its stable form with the Galaxy S26 series in the coming weeks. The first two One UI 8.5 betas were released in December, while the third was released in January, and the fourth beta is now rolling out to Galaxy S25 series owners in South Korea, India, Germany, the UK, and the US. If you're on a Galaxy S25 and want early access, you can enroll through the Samsung Members app by looking for the "One UI Beta Program" banner on the homepage, then head to Settings → Software update → Download and install to pull the beta build.
For those waiting for the stable release, the improvements in One UI 8.5 represent a meaningful step forward in multi-SIM usability. Dual-SIM support has been mainstream for years, with eSIMs making it even easier to maintain two lines on one device, but the user experience has lagged behind the hardware capabilities. One UI 8.5 closes that gap, delivering the kind of polish and intelligence that power users have been asking for. Whether you're managing personal and work lines, optimizing for international travel, or just tired of manual SIM switching, this update is designed to make your life easier—and that's exactly what a software update should do.
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