If you just took your Samsung Galaxy S25 Ultra And if you've noticed that next to the USB-C port on the bottom there's a small slot or hole, it's perfectly normal to have doubts. Many people think it could be a defect, a rare blockage, or even a second connector Samsung hasn't explained it well, and that, combined with the fact that the cable goes in a bit "hard" the first few times, raises concerns.
The reality is much simpler: That slot is part of the phone's functional design. The firm feel of the USB-C port is also designed for durability and resistance. Furthermore, the Galaxy S25 Ultra introduces design, hardware, camera, and software changes that affect this lower area, so it's worth understanding what each hole is for, why the connector fits so snugly, and how all of this fits together in a top-of-the-range phone.
Galaxy S25 Ultra design and changes in the lower area
Samsung has positioned the Galaxy S25 Ultra as a twist on the design of the previous generationpolishing details that seem small but make a big difference in daily use. One of these adjustments is located precisely at the bottom of the phone, where the USB-C port, the slot you see next to it, and the speaker openings.
The first thing that jumps out when you pick it up is that the terminal is clearly lighter than its predecessor. The Galaxy S25 Ultra weighs around 218 grams, that is, about 15 grams less than the previous model. On a large phone, that weight reduction is noticeable when holding it in one hand, using it for extended periods, or carrying it in your pocket, and it even affects how you handle it. What type of car cover or mount is right for you? so that it doesn't look cumbersome.
The thickness has also been slightly reduced, with a chassis around a 15% thinnerThis isn't just an aesthetic issue: by slimming down the structure, Samsung has been forced to reorganize the interior, including the layout of battery, motherboard, speakers, microphones and the USB-C connector itself at the bottom of the device. This internal compaction partly explains the feeling of a "tighter" port and of holes very close together.
Another change that is very noticeable in hand is in the corners and edges of the chassisThe previous model had rather sharp edges that dug into the palm. In the S25 Ultra, Samsung has softened those edges while maintaining the square "Ultra" aesthetic, but making it more comfortable to hold. This gentler curvature also affects how to finish the base of the phone, around the USB-C and the small holes that surround it.
Visually, the appearance of the rear lenses and their rings with other high-end models from the brand, including the foldable ones. This might seem unrelated to the bottom section, but it's part of the same idea: Every perforation, slot, or visible piece has a purpose and a consistent style. within the device assembly.
What exactly is the slot next to the USB-C port on the Galaxy S25 Ultra?
If you look closely at the bottom of the Galaxy S25 Ultra, you'll see several openings: the USB-C port in the center or slightly offset, an area with small holes in a row that corresponds to the speaker and, very close to the connector, a small round hole which often causes confusion. Depending on the region or specific variant, that slot may correspond to:
- Main microphone for calls and audio recording.
- Hole of SIM tray ejection if the tray is located at the bottom and not on the side.
- In some designs, a Additional perforation for symmetry or minimal ventilationalthough it usually has a microphone function.
In the Galaxy S25 Ultra, following the trend of Samsung's latest high-end models, The small round slot next to the USB-C port is, in most cases, a microphone.It is responsible for capturing your voice during calls and recording some of the sound when you record videos, making it a key part of the mobile phone's audio system.
If you also see an elongated area with several holes in a row, that part corresponds to the bottom speakerSamsung pays close attention to visual symmetry, so from the outside it may seem that there are many "mysterious gaps" around the connector, but in reality the function of each one is very clear: USB-C port for charging and data, speaker, microphone(s) and, depending on the version, SIM tray opening.
It is very important to understand that That slot is not a second USB-C, nor a connector lock, nor a hidden buttonIf you insert the cable tip, a pin, or any metal object other than the SIM eject tool (if applicable) into the tray, you can damage the microphone or internal mechanism. This type of damage usually results in Bad calls, recordings with muffled sound, or constant noisesAnd the repair is not usually cheap.
Why the USB-C cable goes in harder on the S25 Ultra
One of the most talked-about sensations among those who get their first S25 Ultra is that The USB-C connector requires more force than usual to fully insert into the port. As long as the cable fits completely, without getting stuck halfway, and once inside it doesn't come loose with normal movements, this is usually expected behavior by design.
Samsung is betting here on a Secure anchoring of the female USB-C portThe goal is for the connector to be securely attached and not wobble when you're playing games, watching videos, or using your phone while it's charging. The internal tabs and the port's metal structure are designed to offer slightly more friction than in more basic devices, so that Accidental disconnections and slack will decrease over time..
Added to this is the search for high resistance to dust and splashesThis aligns with the certifications Samsung uses in its high-end range. A more compact interior with tighter manufacturing tolerances means there's less play within the connector, resulting in a slightly tighter port at first. It's not that it's badly made, it's just that it's tighter..
It's still a good idea to check the cable you're using. Make sure that The connector must not have any metal burrs, deformations, or dirt.A poor-quality cable or one with a deformed connector can require a lot of force to insert and end up damaging the phone's USB-C port pins. It's also a good idea to check that dust, lint, or grit doesn't accumulate in the USB-C port opening of the S25 Ultra, something that often happens after carrying it in your pocket for months.
If everything is clean, the cable is decent, and the phone charges normally without interruptions, The initial hardness usually decreases slightly with use.The port "settles" and remains at an intermediate point: it is still firm and stable, but no longer gives that impression that you have to push as if you were going to break something.
On the other hand, if you notice that You have to exert excessive forceIf the connector doesn't fully connect, charging is interrupted by the slightest movement, sparks appear when plugging in, or the connector gets too hot, the wisest course of action is to stop. In these situations, the recommended course of action is Do not continue forcing it and contact technical support.Take your device to a Samsung repair shop or your trusted store to have both the port and cable checked. Physical damage to the USB-C port can require a motherboard or module replacement, resulting in serious problems.
The bottom of the S25 Ultra as a connectivity hub
The area where they coexist slot next to the USB-C, the port itself, and the speaker It's more important than it seems at first glance. It's not just "the part where you charge your phone": in a flagship like the S25 Ultra, that charging dock is a small connection and sound center that intervenes in almost everything you do with your phone.
From the USB-C port you can charge the device's high-capacity batteryTransferring files at high speed, connecting hubs, external storage, network adapters, audio DACs, or even outputting video signals to compatible monitors. Having a mechanically robust and securely attached connector helps prevent problems during use. fast charging and intensive use of accessoriesAs well as better manage heat that is generated in that area.
The microphone next to the USB-C port doesn't work on its own. It's part of a... set of microphones distributed throughout the chassis which handle noise cancellation during calls, audio capture in video, and advanced features like voice recognition. That small, seemingly insignificant hole is key to... your voice reaches the other person clearly. even if you're on the street, in a noisy cafe, or on public transport.
That's why it's so important not to cover it up. A poorly cut case, thick stickers, or the gesture of Hold the phone while covering that area with your finger They can directly affect audio quality. It's also a very bad idea to poke it with paper clips, pins, or awls out of curiosity, because the microphone's internal diaphragm is delicate and can be punctured or filled with dirt quite easily.
High-end hardware: processor, screen, and durability
Beyond the slot and the port, the Galaxy S25 Ultra remains at the top of the Android landscape thanks to very powerful and balanced hardwareThe heart of the device is provided by Qualcomm with the new Snapdragon 8 Elite, a chipset geared towards extreme performance in gaming, video editing, advanced photography and, especially, artificial intelligence tasks which are becoming increasingly important in everyday life.
The combinations of RAM and internal storage are at the top of the market, offering seamless multitasking, fast app launching And plenty of space for photos, high-resolution videos, work files, and demanding games. All that power allows the S25 Ultra to continue performing well. for years without feeling like I fell short potentially.
The screen size increases by one step to about 6,9 incheswith thinner bezels so the phone's body doesn't get too big. It maintains an excellent anti-reflective coating, so that Using your mobile phone in the sun or outdoors is more comfortableAnd Corning's Gorilla Glass Armor 2 is being launched. This glass promises greater resistance to scratches and accidental bumpsThis is especially interesting if you often place your phone face down or if you've dropped a previous phone more than usual.
All of this results in a device that not only has plenty of power, but also It withstands the test of time well physically., including sensitive areas such as the bottom frame, the screen edges and the USB-C area itself.
One UI 7 and Android 15: Refined and smarter software
In terms of software, the Galaxy S25 Ultra comes with One UI 7 based on Android 15This is one of the biggest updates Samsung has applied to its interface in recent years. The interface feels more polished, with revised icons, more coherent menus and a cleaner aestheticbut without losing the advanced options that have made One UI popular among advanced users.
One of the device's strongest points is its update policy. Samsung maintains this policy for this model. seven years of system updates and security patchesplacing it among the Android phones with the best long-term support. Add that to powerful hardware and a meticulous design, and you have a phone that... It can remain perfectly usable for a long time. without falling behind in features or protection against vulnerabilities.
Before you start experimenting with all the new features, it's always worth making sure your phone is up to date. Updating the software is a simple process: Open Settings > Software Update > Download and Install and follow the on-screen instructions. This will ensure you have the latest stability improvements and bug fixes released by Samsung.
Artificial intelligence is gaining significant prominence
The Galaxy S25 Ultra is designed to artificial intelligence becomes part of everyday useNot as something you open occasionally, but as an engine that accompanies you at all times. Samsung has refined many of the familiar features and added new ones that leverage AI to simplify tasks and save time.
One of the most visible changes is the role of Gemini as main assistantwhich now takes center stage in several system functions. Image generation is improved, with more detailed and realistic results, and highly practical features are incorporated, such as call recording with automatic transcription, available in Spain. This is especially useful for interviews, phone meetings, or calls with important information that you want to keep.
Some of these AI capabilities are executed directly on the device itself, without needing an internet connectionThis not only makes many functions respond faster, but also provides greater privacy, since certain data doesn't need to leave the phone to be processed. It's an interesting combination of local processing power and cloud services.
The system also integrates a contextual widget which displays information and access options depending on the time of day and how you use your mobile phone, and a screen selector capable of analyzing what you are viewing to offer quick actions such as creating GIFs, taking screenshots, copying text, or sharing specific snippetsEverything is designed so that AI is a continuous support rather than an isolated function.
As an extra, the S25 Ultra includes as standard 6 months of Gemini Advanced at no costThis allows you to try out more advanced AI features and further unlock the potential of Samsung's processor and software ecosystem.
Galaxy S25 Ultra cameras and video jump
In photography, the Galaxy S25 Ultra opts for a strategy of Continuity in hardware but with clear improvements in processingIt retains a 200-megapixel main sensor that offers a very high level of detail, with good performance in both good light and complex scenes, and maintains a zoom system with double telephoto lens with 3x and 5x magnification to cover most portrait and long-distance photography situations.
The big news in photographic hardware arrives in the ultra wide-angle, which goes from 12 to 50 megapixelsThis jump in resolution allows you to capture wider shots with more detail in landscapes, architecture, or interiors, and gives you more leeway to crop the image without sacrificing quality. It's a modest improvement on paper, but very useful in everyday life if you enjoy panoramic photos.
Where there is a noticeable leap is in video. The Galaxy S25 Ultra incorporates, for the first time, video capabilities. recording in LOGA logarithmic profile produces an intentionally flatter image with less contrast and saturation by default. This leaves plenty of room for adjustments. correct color and contrast in editingThis is something highly valued by content creators and users who edit their videos in professional programs.
Professional video tools are also improving, with the arrival of Zebra patterns to mark overexposed areasIt's a typical feature of professional film or video cameras that helps you better control the lighting during recording and prevent highlights from being blown out without you noticing.
Samsung has also worked with Qualcomm to fine-tune the real-time noise reduction engineThe system can distinguish moving subjects, static elements, and changes in the scene, applying different levels of processing as needed. The result is videos with less grain in low-light conditions. More useful detail and a more natural look without reaching that feeling of a "plasticized" image that sometimes bothered previous generations.
Versions, prices and colors of the Galaxy S25 Ultra
The Galaxy S25 Ultra is unequivocally positioned at the top of Samsung's range, a fact reflected in both its specifications and its price. In the Spanish market, it arrives with several internal storage options, all of them with top-of-the-line hardware and focused on different user profiles.
- Galaxy S25 Ultra 256GB | 1.459 euros.
- Galaxy S25 Ultra 512GB | 1.579 euros.
- Galaxy S25 Ultra 1TB | 1.819 euros.
The family is completed with the models Galaxy S25+ and Galaxy S25which offer more modest memory configurations and somewhat more affordable prices. For reference, the S25+ comes in 256GB and 512GB variants, while the standard S25 offers 128 and 256 GBeach with its own particular balance between budget and features.
In terms of style, the S25 Ultra is presented in a fairly wide range of colorsAmong the more classic options are blue, black, silver, and gray, geared towards those who prefer something more understated. Alongside these are special shades such as Intense black, rose quartz and emeraldwhich in many cases are reserved for the official Samsung store or specific channels, giving a more exclusive touch to certain combinations.
Ultimately, the small slot you see next to the USB-C port and the feeling that the cable goes in somewhat stiffly fit within a design that is very thoughtfully crafted to be durable, functional, and consistent with the rest of the Galaxy S25 Ultra. Know that this hole is usually the main microphone, that you shouldn't pierce it or use it as a connector, and that the USB-C port is deliberately fitted. It allows you to use the phone with peace of mind, avoid unnecessary scares and, incidentally, better appreciate everything that a device has to offer that combines lightness, power, very complete cameras, AI-powered software and long-term update support.
