"SIM-free iPhones" are attracting attention among those who think, "I want to reduce my monthly fees" and "I want to choose my preferred carrier freely."
However, for first-time users, there must be many concerns such as "What is SIM-free?", "How is it different from a carrier-locked version?", and "Is a used one okay?".
This article explains the basic knowledge, pros and cons, and points to consider when choosing a SIM-free iPhone in an easy-to-understand manner.
In addition, we also introduce PRODIG's services as a recommended way to purchase with confidence even for first-timers.
If you want to start a free and affordable smartphone life, please refer to this article.

What is a SIM-free iPhone in the first place?

A "SIM-free iPhone" is,

as the name suggests, "an iPhone that can freely use SIM cards from any communication carrier."

In recent years, carrier-locked versions are increasingly sold "SIM-unlocked," but there are slight differences from completely SIM-free versions.

Differences between carrier-locked and SIM-free versions

A carrier-locked iPhone is a device purchased from a specific telecommunications company such as Docomo, au, or SoftBank.
These have a "SIM lock," which prevents them from being used with SIM cards from carriers other than the one they were purchased from.

On the other hand, iPhones sold at official Apple stores and SIM-free specialty stores do not have a SIM lock from the start.
This makes it easy to switch carriers or replace SIM cards when traveling abroad.

Pros and Cons of SIM-free iPhones

[Pros]

• You can choose your preferred carrier's SIM
  

• You can switch to a low-cost SIM and significantly reduce monthly costs
  

• Good compatibility with overseas SIMs, allowing for cheap communication while traveling
  

[Cons]

• May require manual initial setup and APN settings
  

• Used devices may carry the risk of becoming "red-flagged" due to unpaid balances
  

• Communication speed may be slow with some low-cost SIMs
  

Who is it suitable for?

• Those who want to reduce their monthly phone bill
  

• Those who travel or go on business trips frequently
  

• Those who want to use multiple carrier lines
  

• Those who want to own an iPhone as a sub-device cost-effectively
  
  

Points to consider when choosing a SIM-free iPhone

Even with convenient and affordable SIM-free iPhones, choosing incorrectly can lead to regrets like "It doesn't work at all!" or "I got ripped off!".
Here are some points to consider.

Choose a device that has been checked for operation

Especially for used SIM-free iPhones, whether they are "operationally checked" is important.
In discount shops or personal transactions, inspection may be lax, and defects may be hidden.
Make sure the retailer properly checks the battery, buttons, camera, and speaker.

Check for red flags and outstanding balances

If a carrier-locked version is sold as "SIM-unlocked," there is a risk of it becoming red-flagged later if an outstanding balance remains.
If it becomes red-flagged, communication will stop, and repairs will also be refused.
Always choose a trustworthy store that offers a "permanent red-flag guarantee."

Tips for using with a low-cost SIM

When using a low-cost SIM, depending on the carrier, the supported bands may differ, making it difficult to get a signal.
APN settings may also be required, so check the official setup guide.
If you are unsure, it is safer to consult with store staff.

If you're buying a used SIM-free iPhone, PRODIG is recommended

If you're buying a used SIM-free iPhone, where you buy it is the most important point.
PRODIG offers "operationally checked, permanent red-flag guarantee, and excellent support," making it safe even for beginners.

All devices checked for operation & guaranteed

At PRODIG, all devices are checked for operation by professional technicians.
A permanent red-flag guarantee and initial defect warranty are also included, so you can rest assured in case of any issues.

[Internal Link]
Click here for a list of used iPhones

You can see the actual product and consult at the Akihabara store

In addition to online, you can actually hold and check devices at the Akihabara store.
Expert staff can answer any questions before your purchase, so even first-time buyers can feel at ease.

[Internal Link]
Click here for Akihabara store information

Reliable support even for online purchases

Even for online purchases, a 6-month warranty is included.
In the unlikely event of a problem, support is available via email, phone, or at the store, so you can use the service with peace of mind even from afar.

Summary | Use your smartphone freely with a SIM-free iPhone

SIM-free iPhones are attractive for their convenience, allowing you to freely switch between low-cost SIMs and international SIMs.
However, choosing incorrectly can lead to risks such as red flags or operational defects.
The trick to avoiding failure is to choose an operationally checked device from a reliable store and purchase it with a warranty.

PRODIG ensures all devices are operationally checked and come with a permanent red-flag guarantee, making it safe for your first SIM-free experience.
First, check the inventory and find the perfect device for you!

Check out the latest inventory (CTA link)

[Internal Link]
「View SIM-free iPhone inventory
Click here for trade-ins
Click here for rentals