"I want to use an iPhone 14 with au, but the device is too expensive." "Is it really safe to buy a used iPhone for au?" For those with such concerns, we explain how to get an iPhone 14 at a lower cost. This article compares two methods for using an iPhone 14 with au (official purchase / used purchase + SIM contract), detailing the advantages and precautions of each. Furthermore, it covers choosing an iPhone 14 series model, compatibility with au plans, how to select a used device, and trustworthy retailers.

Two ways to use an iPhone 14 with au

① Official au purchase (new / au Certified pre-owned)

au sells the iPhone 14 series as new devices or certified pre-owned (au Certified). The advantage of official sales is comprehensive support for initial defects and malfunctions, and easy enrollment in device warranty services. Even with au Certified, devices that meet certain inspection standards are provided, offering peace of mind regarding quality. Additionally, discounts like "Smartphone Tokusuru Program" (installment payment + residual value setting type) are available, which is attractive for those who want to keep initial costs down.

On the other hand, monthly fees tend to be higher, and there may be cases where enrollment in unnecessary options is a condition, so it's important to be mindful of the total cost.

② Used iPhone 14 from PRODIG + au SIM contract

Another option is to purchase a SIM-free iPhone 14 from a reliable used retailer and sign a SIM-only contract with au. This method allows you to significantly reduce the device price while choosing a data plan that suits you. Even with used devices, if you choose products with a red-ROM warranty and confirmed operation, there is almost no concern about trouble.

PRODIG, in particular, offers devices that are all inspected and cleaned, with battery levels and exterior ranks clearly stated, making it a reassuring choice even for those new to buying used.

PRODIG's used iPhone 14 lineup

iPhone 14 series model comparison: Which model is right for you?

The iPhone 14 series has four models (14 / 14 Plus / 14 Pro / 14 Pro Max). All are equipped with an A15 or A16 Bionic chip, providing performance that can handle daily use, as well as gaming and video editing.

• iPhone 14: Standard size. Easy to hold, and the price is relatively lower.

• iPhone 14 Plus: Features a large screen and long battery life. Ideal for watching videos and gaming.

• iPhone 14 Pro: Equipped with advanced features such as a 120Hz ProMotion display and telephoto lens.

• iPhone 14 Pro Max: Top-of-the-line model. Performance, battery, and screen are all top-class.

All models are available in the used market, allowing you to choose the one that suits your needs.

Compatibility between data plans and used devices

Explanation of main au plans (Pitat Plan+ / Unlimited MAX / Smartphone Tokusuru Program, etc.)

au offers a variety of plans, such as the tiered "Pitat Plan+" and "Unlimited MAX" for large data users. When using a used device, you can sign a "SIM-only contract" with these plans, which is attractive for significantly reducing monthly fees. Also, both SIM cards and eSIMs are supported, so if your device is compatible, you can start using it immediately.

On the other hand, device discounts such as the "Smartphone Tokusuru Program" do not apply, but in return, contract flexibility is higher, and unnecessary restrictions can be avoided.

Precautions when contracting with a used device (warranty / restrictions / cancellation fees)

When using a used iPhone with au, it is generally the case that the device itself is not covered by a warranty. To prepare for possible malfunctions or battery degradation, check if the retailer's warranty system (such as red-ROM warranty) is comprehensive.

Also, when contracting, it is important to choose the option that doesn't include a device, and to carefully examine the conditions for cancellation fees and contract restrictions. Major carriers like au often have detailed conditions for initial discounts, so it's important to choose a plan that suits your usage.

Checkpoints for a safe used iPhone 14 purchase

Importance of checking for SIM-free / au version (SIM lock, eSIM support)

When purchasing a used device, always check if it is "SIM-free" or "SIM-unlocked." If you want to use it with au, it may not work if the SIM lock remains. Also, if you wish to contract with eSIM, you need to confirm if the device is eSIM compatible.

PRODIG clearly states network usage restrictions (red-ROM) and SIM-free status for all products, allowing you to choose with confidence.

How to interpret exterior rank, battery capacity, and red-ROM warranty

When choosing a used iPhone, key factors are exterior scratches, battery capacity, and the presence of a red-ROM warranty. PRODIG not only states the maximum battery capacity but also displays the exterior condition by rank and applies a red-ROM warranty to all products.

Additionally, actual photos of each product are posted, which provides peace of mind by allowing you to check the condition beforehand.

Advantages of buying a used iPhone 14 from PRODIG

Inspected, detailed photos, and clear information for peace of mind

All used iPhone 14s at PRODIG are operationally checked and cleaned. Information such as the presence of network usage restrictions, battery level, and exterior condition is clearly stated, allowing you to thoroughly check before purchasing. For those who are hesitant about used items, the thorough disclosure of information is a significant source of reassurance.

Cost-effectiveness & flexibility with the "Used + au SIM" operational route

Purchasing a device from PRODIG and signing a SIM-only contract with au is an excellent method that significantly reduces device costs while allowing you to choose a plan that suits you. Furthermore, you can continue using your existing au line, which reduces the hassle of switching or re-contracting, making it easy to upgrade to the latest model.

Q&A: Resolving questions about using au + used iPhone 14

Can used devices be used with au without issues?

If it's a SIM-free or SIM-unlocked iPhone 14, it is generally compatible with au's frequency bands and can be used without issues. There are no problems with communication quality, and the coverage area is wide, so you can rest assured.

What is the difference between a SIM card and an eSIM?

An eSIM is a digital SIM embedded in the device, eliminating the need to physically swap cards. au also supports eSIMs, and if a used device is compatible, the process can often be completed online, which is very convenient.

How does PRODIG handle red-ROM and warranties?

PRODIG sells products with a red-ROM warranty, offering free replacements if network restrictions are imposed. Additionally, some products also cover initial defects and battery degradation, so you can choose with confidence regarding warranty coverage.

Check PRODIG's reliable warranty system

Finally

If you want to use an iPhone 14 with au, you don't necessarily have to buy a new device officially. Purchasing a SIM-free iPhone 14 from a reliable used retailer (e.g., PRODIG) and signing a SIM-only contract with au is a highly flexible option that saves costs.

Even for those who were hesitant about used items, a retailer like PRODIG that provides transparent information and solid warranties allows for confident adoption. If you want to start a cost-effective iPhone life, please consider purchasing from PRODIG.

PRODIG's used iPhone 14 series lineup