The recent smartphone market has seen a trend towards larger screens to enhance the immersive experience of video viewing and gaming. However, many users are dissatisfied with these larger phones, finding them "difficult to operate with one hand" or "heavy and bulky in a pocket."

While the options for compact models are dwindling in the new phone market, the used market offers a wide selection of excellent devices, including the iPhone mini series.

Even if you're hesitant about used items due to concerns about "quality" or "battery life," you can still find your ideal device at an amazing price if you know what to look for. In this article, a smartphone expert introduces carefully selected compact models and thoroughly explains how to choose a used smartphone without making a mistake.

Why Choose a "Compact Smartphone" Now? 3 Benefits

Current smartphones typically have screens of 6.1 inches or larger, and it's not uncommon to find models exceeding 6.7 inches. However, not all users desire large screens.

For users who want to operate their phone quickly with one hand, especially while on the go or working, compact smartphones offer an irreplaceable appeal. Here, we'll delve into three specific reasons why you should intentionally choose a compact device now.

The biggest advantage is "overwhelming ease of operation." The feeling of being able to reach from one end of the screen to the other with just one thumb is something you can't experience with larger smartphones. There's no need to shift your grip when pulling down the notification center or typing on the keyboard, and the risk of dropping the phone is significantly reduced.

The light weight is also a significant advantage. Your wrist is less likely to get tired even during long calls or prolonged social media use, which can help prevent "text thumb injury" (thumb deformity) and tendinitis, common ailments in modern times.

Next is "high portability." With the current trend of tight-fitting pants and mini bags, large smartphones can hinder storage.

A compact smartphone won't get in the way when you sit down, even if you put it in the front pocket of your jeans, and it won't distort the shape of your shirt if you put it in a breast pocket. This "maneuverability that doesn't overstate its presence" is hugely popular among minimalists and those who want to reduce their belongings.

Finally, there's "overwhelming cost-effectiveness in the used market." Since the lineup of new compact smartphones is decreasing, targeting used models from 1 to 3 generations ago is the smartest choice. Especially for the iPhone mini series, you can often get them for less than half the price of the latest large models in the used market, allowing you to use the saved budget for accessories or peripherals.

Comfortable One-Handed Operation! Reach Every Corner of the Screen with Your Thumb

One criterion defining a compact smartphone is a width of 70mm or less. Due to the structure of the human hand, a narrower width increases grip and expands the thumb's range of motion.

For example, the iPhone mini series with its 5.4-inch display has a very slim width of approximately 64.2mm. This allows for seamless operation of all functions, even when holding onto a train strap or carrying luggage.

Have you ever accidentally dropped a large smartphone while trying to tap an icon at the top of the screen by stretching your finger too far and losing your balance? With a compact model, such alarming moments are dramatically reduced. Typing speed also improves.

Since the physical distance your finger needs to travel is shorter, faster and more accurate typing becomes possible. Even if it's not a digital detox, reducing unnecessary stress from smartphone operation directly leads to an improved quality of life.

Highly Portable, Fits Perfectly in Pockets and Mini Bags

The increasing size of smartphones has, in some ways, diminished the convenience of fashion. Especially during the summer months when wearing lighter clothing, putting a large smartphone in your pocket can cause your pants to sag due to the weight as you walk, or create an unnatural bulge.

Compact smartphones elegantly solve this problem. Regarding weight, while typical large smartphones weigh over 200g, many compact models weigh around 130g to 160g, offering a lightness that makes you forget you're carrying them.

This size is also important for those considering carrying two phones. If your main phone has a large screen, choosing a compact model as a sub-phone specifically for calls, payments, or music playback can maximize convenience while keeping the overall load light.

In business settings, it can be slipped into an inner pocket without disrupting the suit's silhouette, maintaining a smart appearance. Thus, a compact smartphone is not just a device, but a tool that lightens your lifestyle.

Excellent Cost Performance: Get High-Spec Devices at Low Prices in the Used Market

The idea that "smaller smartphones have lower performance" is a thing of the past. Many recent compact models are equipped with flagship-level chips of their era, and even models from a few years ago offer more than enough performance for daily use.

For example, the iPhone 13 mini features an A15 Bionic chip, which can run the latest apps and games smoothly. In the used market, well-maintained units of this model are traded at very reasonable prices.

The biggest concern when choosing a used smartphone is its "lifespan." However, high-quality devices like Apple products have long OS support periods, allowing them to be used for several years even after being purchased used.

Reliable shops like PRODIG sell only devices that have passed strict inspections, minimizing the risk of getting a "lemon" that is common with used goods.

For those hesitant to spend over 100,000 yen on a new phone, a high-spec used compact smartphone available for around 50,000 yen will likely be the most satisfying choice.

【iPhone Edition】Compact Models to Target in the Used Market

When searching for "compact" within the iPhone series, there are generally two main categories: the "mini series" with a bezel-less, full display, and the "SE series" which retains the traditional home button.

While similar in size, they have different characteristics in terms of operability, display clarity, and camera performance. These models are consistently available in the used market, allowing you to choose according to your budget and preferences.

Many models are no longer sold on the official Apple website, so the primary way to acquire them is through used retailers. However, this is by no means a negative thing.

Below is a summary of popular iPhone compact models that are currently worth considering at Prodig.

iPhone 13 mini｜The Last and Strongest Mini Series Model

The iPhone 13 mini can be considered the definitive "ideal compact smartphone" for many users. The battery life, a weakness noted in the previous 12 mini model, has been significantly improved, now offering enough stamina for a full day's use. The A15 Bionic chip it features is the same generation as the standard iPhone 14 model, still effortlessly handling all tasks in 2026.

In terms of camera performance, it boasts a distinctive diagonally arranged dual-camera unit and employs sensor-shift optical image stabilization. This allows for sharp, beautiful photos even in nightscapes and video recording. It's incredibly small in size, yet its capabilities are close to professional-grade. This contrast is the true charm of the 13 mini. While it remains highly popular in the used market and tends to hold its value, it's the most worthwhile investment if you're looking for a device that will last.

▶View iPhone 13 mini products

iPhone SE (3rd Gen)｜Best Value for Home Button Enthusiasts

The iPhone SE (3rd generation) is the only current performance model featuring "Touch ID" (fingerprint authentication), which has been re-evaluated during the mask-wearing era. While its design follows the classic iPhone 8, it is powered by the same A15 chip as the iPhone 13 series. It has the charm of "a wolf in sheep's clothing," with a retro appearance but cutting-edge internals.

The 4.7-inch screen may seem very small by today's standards, but the presence of top and bottom bezels provides space to rest your fingers when holding it horizontally, offering an unexpected advantage for gaming. Above all, its abundance in the used market and stable price are appealing. With good condition units available from around 30,000 yen, there's no better choice for a first used smartphone or a secondary work phone.

▶View iPhone SE (3rd generation) products

iPhone 12 mini｜For Those Who Want 5G Compatibility on a Budget

The iPhone 12 mini is a landmark model, the first to be branded "mini" by Apple. While its battery capacity is slightly less than the 13 mini, its body is astonishingly light, weighing only 133g. This is dozens of grams lighter than most current smartphones, a level of lightness that will make you exclaim "it's so light!" the moment you pick it up.

It also supports 5G communication, ensuring it's not behind in connectivity. MagSafe charging is also supported, allowing for smart usage with magnetically attached accessories on the back. In the used market, it often trades for 10,000 to 20,000 yen less than the 13 mini, making it the perfect time to buy for those who prioritize budget and "want an iPhone that is simply small and light."

▶View iPhone 12 mini products

【Android Edition】Compact Models Easy for Smaller Hands

In the world of Android smartphones, there's an even greater variety of compact models than with iPhones. While Android devices once steadily grew larger, recent years have seen a renewed focus on "easy-to-hold" models with narrower widths, catering to the needs of the Japanese market. Brands like Google's native Pixel series, and Japanese tech giants Xperia and AQUOS, are all pursuing compactness with their own unique innovations.

The advantages of choosing Android include the ability to use both fingerprint and facial authentication, expandable storage via SD card (on some models), and flexible placement of Osaifu-Keitai (mobile payment) functionality, offering more practical choices. Additionally, in the used market, prices for Android devices fluctuate more dramatically than iPhones, meaning you can sometimes find high-end models from 1-2 years ago at surprisingly low prices. If you want to "enjoy customization" or "prioritize specific features," a compact Android phone is ideal.

Below are some Android compact models worth targeting in the used market right now.

Google Pixel 8a / 7a｜Best Balance of AI Features and Size

Google Pixel's "a series" is a popular line that achieves incredible cost-effectiveness by simplifying materials and some features while largely retaining the performance of higher-end models. The Pixel 8a and 7a feature approximately 6.1-inch displays, which, while not strictly "compact" by numerical standards, offer an excellent fit in the hand due to their rounded design.

Particularly noteworthy are Google's acclaimed AI camera features. With "Magic Eraser" and "Best Take," post-capture editing is incredibly flexible, making it ideal for frequent social media users. Furthermore, the Pixel 8a guarantees up to 7 years of OS and security updates, ensuring a long and secure usage even when purchased used. Among Android phones, it's the most reliable choice, a "can't go wrong" option.

Xperia 10 Series｜Excellent Grip with a Slim Width

Sony's Xperia 10 series features a unique 21:9 tall display, unlike other smartphones. The biggest advantage of this aspect ratio is that it maintains screen real estate while keeping the device's width incredibly narrow, at approximately 67-68mm. This width is almost identical to the iPhone SE, allowing even those with smaller hands to get a firm grip.

The tall screen is great for displaying more of a social media timeline at once and works very well with the "multi-window" feature that shows two apps side-by-side. The Xperia series' traditional long battery life is also present, and despite being compact, it features a large battery, making it a popular choice for users who prioritize battery life. Recommended for those who want to enjoy videos in a cinematic aspect ratio or prefer a stylish design.

AQUOS wish Series｜Simple, Durable, and Perfect for a Secondary Device

Sharp's AQUOS wish series are entry-to-mid-range models designed with the concept of "unadorned simplicity." Featuring a smallish 5.7-inch screen and a matte, non-slip body texture, it's extremely easy to handle with one hand. The strength of this phone lies in its "toughness." It's not only waterproof and dustproof but also shock-resistant, making it suitable for outdoor use or for professionals who are frequently on the go.

In the used market, it can be found for as low as 10,000 yen, making it very affordable. It's also popular as a secondary phone for calls only, or as a child's first smartphone. For practical users who don't need excessive specs but can't compromise on essential Japan-specific features like Osaifu-Keitai (mobile payment) and waterproofing, this device perfectly meets their needs.

Summary｜Make Your Smartphone Life More Comfortable with the Perfect Device

（Image candidate: Illustration or photo of a person looking satisfied with a compact smartphone that fits them well）

Especially now, as smartphones grow larger, choosing a compact model is a smart decision that prioritizes your own "ease of use" and "comfort." With effortless one-handed operation and freedom from carrying stress, your smartphone evolves into a more familiar and convenient tool. With fewer options for new compact phones, the used market is truly a treasure trove.

The excellent devices highlighted in this article—such as the iPhone 13 mini and SE series, or Android models like Xperia and Pixel—can be found in the used market at incredibly cost-effective prices. By carefully checking the battery capacity, exterior condition, and the presence of a "red-listed phone guarantee," your concerns about used items should be remarkably alleviated.

Frequently Asked Questions (FAQ)

Q: Is the text hard to read on compact smartphones due to the smaller screen?

A: While the display area is indeed smaller than on larger devices, modern smartphones allow you to significantly adjust text size in the settings, so there are few practical issues. In fact, usability for tasks like scrolling improves because your finger can reach the entire screen.

Q: I'm concerned about the battery life of used smartphones. Can it be replaced?

A: Yes, for iPhones, it can be replaced at Apple Authorized Service Providers or repair shops. If you're concerned about the battery of a device purchased from PRODIG, it's recommended to check the maximum capacity beforehand or purchase it at a lower price anticipating future replacement costs.

Q: Are there any plans for new iPhone mini series models in the future?

A: According to current leak information, there are unfortunately no signs of the mini series making a comeback. Therefore, if you're looking for a compact, full-display model, getting a well-maintained iPhone 13 mini from the used market is the most realistic and smart approach.

Q: Can I use it with a low-cost SIM?

A: Yes, most devices sold by PRODIG are SIM-free or SIM-unlocked, so you can use them directly with various low-cost SIMs (MVNOs).