If you've ever wondered how connect a flash drive, a keyboard or even a camera to your mobile phone, the answer is almost certainly USB OTGThis handy little feature turns your smartphone or tablet into a USB host capable of communicating with peripherals just like a computer. Below, you'll find a complete, practical guide in Spanish, to help you understand what it is, how to activate it, and how to get the most out of it on both Android and iOS/iPadOS.
We will cover from the compatibility check and the adapters you need to the most useful uses and some very real considerations that are often overlooked. We'll also include examples of common products, options for emergencies (like a broken screen), and sustainability notes linked to recycled material certifications found on some accessories.
What is USB OTG and why do you care?
USB OTG (On-The-Go) It's a technology that allows your phone or tablet to act as a USB host, just like a computer port. In practice, this means you can plug in external peripherals such as keyboards, mice, USB flash drives, hard drives, digital cameras, game controllers, and more, without having to go through your PC as an intermediary.
The beauty of OTG is that it transforms your device into a small work or entertainment station with direct connection to common accessories. It's especially useful for those who manage large files, create content, play with wired controllers, or need to work more comfortably with a keyboard and mouse.
In addition, on many Androids OTG opens the door to features such as reverse charging to power another device. In everyday use, this gives you the flexibility to transfer data, print via cable if Wi-Fi fails, or connect an Ethernet adapter when you want a stable network.
How to check if your phone supports OTG
Most modern Android phones with USB-C come with OTG support as standard, although it's a good idea to double-check. If you have an older device with microUSB, checking is even more advisable because support wasn't always uniform.
Via official specifications: The "OTG" specification doesn't always appear on the spec sheets, so don't be surprised if you don't see it. At first glance, a port with OTG support is indistinguishable from one without, so looking at the connector is useless.
Via dedicated app (recommended): Tools like OTG Checker help you verify compatibility from the phone itself. This app checks for things like the presence of USB Manager and the android.hardware.usb.host.xml capabilities file, and can even list connected OTG devices.
What if the app says it's not compatible? The developer of this type of utility reminds us that it's not "fatal": depending on the issue, root and advanced settings may be required, although for most users this isn't a practical solution. Realistically speaking, if you get a "Not compatible" error, it's wise to accept the limitation.
Quick tip: If your phone is recent and USB-C, it's usually compatible; if it's microUSB, check it with an app. During testing, you'll see messages like "Compatible" or "Not compatible," and you'll be cleared up instantly.
The OTG adapters you need
To take advantage of OTG, you'll need an appropriate adapter or cable that converts your phone's connector into a female USB port for plugging in peripherals. Essentially, the end that goes into your phone must be a male type (USB-C or microUSB), and the other end is usually a female USB-A.
Typical options on Android: USB-C to USB-A is the most common option these days; on older phones, microUSB to USB-A will do the trick. If you buy peripherals with a native USB-C connector (for example, dual USB-C flash drives), you can skip the adapter altogether.
USB Hubs: A hub with a USB-C or microUSB input multiplies the ports and allows you to connect a keyboard, mouse, flash drive, etc. at the same time. Ideal for turning your phone or tablet into a “mini desktop.”
An iPhone / iPad: If you have a Lightning port, the classic option is Lightning to USB-A. On an iPad or iPhone with USB-C, a USB-C to USB-A or USB-C hub gives you a lot of versatility.
Activate OTG on Android
On most Android devices, OTG is activated only when a peripheral is connected with the appropriate adapter. However, some models have a manual setting to enable the feature.
Typical route: Settings > Storage and, if available, select “Enable OTG” or “OTG Connection.” Activate it, connect the adapter and peripheral, and the system should recognize it without further ado.
If your phone doesn't show that option, don't worry: Normally, management is automatic and does not require activating anything, as long as the device is compatible.
OTG on iOS and iPadOS: Compatibility and Limits
You can also use OTG on iPhone and iPad, but with more restrictions than on Android. Models with Lightning and even newer models with USB-C support connecting certain accessories; however, not everything that works on Android will work on iOS.
Typical uses on iOS/iPadOS: File transfer, camera import, and support for some printers. iPads with USB-C offer broader peripheral support, making it more practical for productivity.
Without manual activation: On iOS/iPadOS, the feature isn't "enabled"; you plug in the adapter, and if the peripheral is compatible, the system automatically recognizes it.
Reality of the Apple ecosystem: File streaming typically relies on iCloud and AirDrop, but with iPadOS, external storage support has improved significantly, giving you more leeway to work with memory and disks.
What you can do with USB OTG
1) Transfer files between devices
connect a USB flash drive or external drive and move data without going through your computer. It's perfect for freeing up space, taking videos on trips, or making quick backups. You can even transfer photos from your camera to your phone using the camera cable and OTG adapter.
2) Connect peripherals to work more comfortably
USB keyboards and mice They work immediately, ideal for writing long texts and navigating accurately. If you use a tablet for class or work, you'll notice the jump in productivity immediately.
Wired game controllers are detected and run smoothly without any additional configuration on Android. Models that require a cable (such as some specific mobile controllers) leverage OTG for stable input with low latency.
Digital camerasIn addition to importing photos and videos, many allow wired control of manual settings. You can manage exposure, aperture, or ISO from your phone in compatible apps and work more comfortably.
Audio: You can plug in microphones or USB recorders to improve the quality of your recordings. If your phone's microphone isn't enough, a USB peripheral (such as a desktop microphone) can save you time with impromptu interviews, voice notes, or podcasts.
3) Access to external storage
Pendrive, hard drives or cards via reader: With OTG, you can open them as external storage. You can copy, move, and open files from your favorite manager. It also works for music: carry your songs on a memory card and play them without using up internal storage.
4) Reverse charging on Android
Many Androids allow use your phone's battery to charge other devices via OTG. Useful for giving that energy boost to another phone or wearable when you're short on power and don't have a power bank handy.
5) Print with cable and use Ethernet
If your printer isn't working over Wi-Fi, a USB cable and OTG can help. On Android, you usually need to install the manufacturer's app or printing service to send documents.
Ethernet over USB It's another option for having a more stable network connection than Wi-Fi. On Android, practical compatibility is associated with versions since Marshmallow 6.0 and USB-to-Ethernet adapters. It's a lifesaver when wireless coverage fails.
6) Get your new phone ready
Some manufacturers include a small OTG adapter to migrate data from your old phone (Android or iPhone) to your new one. Connecting both via cable speeds up and simplifies the initial transfer.
7) Diagnostics, recovery and other technical tasks
Diagnostic or recovery tools They can work via OTG to save data from a problematic phone. It's not an everyday use, but when it comes to it, it can save you a big scare.
8) Solution to a broken touch screen
If the touchpad has stopped responding, connect a USB mouse via OTG It lets you control your phone and retrieve information. You can also plug in a keyboard to easily answer emails or enter passwords.
Practical compatibility and usage tips
Manage expectationsNot all USB peripherals will work with all phones, especially iOS. Android compatibility is broad; iOS/iPadOS is more limited, although iPads with USB-C offer better results.
FoodSome hard drives require more power than the phone can supply via OTG. If they fail to mount or disconnect, you may need a powered hub or lower-power memory.
Necessary appsFor printers, it's usually essential to install the manufacturer's app/service. For cameras or advanced parameter control, check which app your model supports.
File managers: Use your favorite browser to access external storage. Almost any will do; the important thing is that it allows you to read and write to mounted drives.
System compatibility: On Android 6.0+, the experience with adapters like Ethernet is more consistent. If you have a very old version, some features may not appear or may not be stable.
Featured OTG Products and Adapters
These examples illustrate common form factors that solve real-world needs on Android and Apple devices. They are compact, plug-and-play accessories designed to be carried in your backpack at all times.
Mini OTG USB Type-C to Lightning adapter – Ref. AC138: Allows you to connect USB-C devices to Apple Lightning devices for file transfers, syncing, or charging. Lightweight and easy to carry between platforms without the hassle.
OTG Type-C to USB adapter cable – Ref. AC141: Designed to connect keyboards, mice, memory sticks, etc., to smartphones, tablets, or laptops with USB-C. Fast transfer, stable connection, and driver-free.
Lightning to USB 3.0 OTG adapter for iPhone/iPad – Ref. AC121: For iPhones and iPads with Lightning that need to connect traditional USB peripherals. With USB 3.0, it accelerates data transfer while maintaining robustness.
OTG USB 3.0 adapter hub to 4 USB 3.0 & 2.0 ports – Ref. AC093: Ideal for connecting multiple accessories at once to OTG-compatible devices. It combines 3.0 and 2.0 ports, a portable design, and immediate use without installation.
OTG also on iOS: recommended adapters
If you use iPhone/iPad with Lightning, a Lightning to USB-A adapter It's the perfect all-in-one for connecting compatible memory cards, cameras, and printers. For iPads or iPhones with USB-C, a USB-C to USB-A adapter or USB-C hub expands your possibilities.
Remember the limitations of Apple's system compared to Android, especially with certain peripherals. Even so, for transferring files and working with external storage, iPadOS has made a notable leap forward.
Buying adapters: quality, price and small details
Los OTG adapters are inexpensive accessories, but it's worth choosing decent materials and, if possible, USB 3.0 support. You'll notice improved performance when transferring large amounts of data and a more solid construction.
If you want to connect “everything” comfortably, a multi-port hub It's the most versatile option. Make sure its main interface matches the connector on your phone (USB-C or microUSB) or your iPad/iPhone (USB-C or Lightning).
Sustainability: Certifications with recycled content
Some accessories on the market boast certifications such as Global Recycled Standard (GRS), which independently verifies recycled content throughout the entire supply chain. For a product to bear the GRS certification, it must contain at least 50% certified material.
This certification guarantees social, environmental and chemical requirements, supporting more responsible purchasing. A common example includes a certification body such as Intertek and a certificate number (e.g., TE-00066022) for traceability.
In sustainability programs such as Climate Pledge FriendlyProducts with GRS meet clear recycled content criteria. If you value environmental impact, looking at these labels can help you prioritize accessories with a smaller footprint.
USB OTG gives you tremendous freedom to work, play, and manage files with your phone or tablet, and choosing the right adapter makes all the difference. Check app compatibility, get the right connector (or a good hub), and take advantage of features like wired printing, Ethernet, camera control, reverse charging, or data recovery when the screen is unresponsive. You can even opt for accessories with recycled content certifications if you want to add a little bit of sustainability.