"I heard the iPhone 16 is waterproof, but is it really okay in the bath or rain?" "I'm considering a used one, but does waterproof performance degrade?" For those with such questions, we thoroughly explain the reality of the iPhone 16 series' waterproof performance and points to consider when buying used. We cover the meaning of IP68 rating, risks of using it in the bath or pool, and how waterproof performance changes in used devices. We also introduce why you can safely choose a used iPhone 16 from PRODIG.

Properly understanding the iPhone 16 series' waterproof performance

According to Apple's official statements, all iPhone 16 series models feature IP68-rated dust and water resistance. This means they are designed to "completely prevent dust ingress and withstand submersion in water up to 6 meters deep for a maximum of 30 minutes." The iPhone 16 (base model), 16 Plus, 16 Pro, and 16 Pro Max all meet this standard.

However, Apple explicitly states that this specification does "not guarantee permanent water resistance," and in actual use, water resistance may degrade over time due to aging or impact. In particular, use in steamy bathrooms or high-temperature environments, as well as damage to internal seals from drops, can lead to malfunctions.

Actual use cases and dangerous scenarios

The iPhone's water resistance is intended for short-term use in "freshwater." In reality, problems are more likely to occur in the following cases:

• Use in the bathroom: Steam and humidity can easily penetrate the iPhone's interior, potentially causing corrosion of the circuit board.

• Pools and海水浴 (ocean swimming): Exposure to salt or chlorine water can damage waterproof seals and terminals.

• Extended use in the rain: Water can gradually seep in through speaker holes and SIM card slots.

• Saunas and high-temperature environments: Since there is no heat resistance, rapid temperature changes can cause condensation inside.

In these usage scenarios, problems can occur even with new devices. With used devices, even greater caution is required.

Points to consider for waterproof performance when buying used

When purchasing a used iPhone 16, the following points regarding waterproof performance should be noted:

• Condition of waterproof seals: Apple iPhones are equipped with sealing to maintain water resistance, but this can peel off or develop gaps due to drops, impacts, or aging. While refurbished products may be re-inspected, not all shops check this.

• Check for refurbished and warranty-backed products: It is essential to choose devices that have undergone refurbishment (such as battery replacement and exterior cleaning), have been tested for functionality, and come with a warranty.

• Exterior check: Cracks on the screen or back increase the risk of water ingress.

When choosing a used iPhone, the "condition of the device," which indirectly reflects its waterproof performance, is an important criterion in addition to its functions.

What to do if it gets wet or submerged, and warranty coverage

Although it is water-resistant, it is not completely impervious to water. If you suspect water exposure or submersion, follow these steps:

1. Immediately turn off the power.

2. Wipe off any moisture with a towel.

3. Do not charge it; allow it to air dry naturally (for at least one day).

4. Without turning it on, consult Apple or the store where you purchased it.

Apple's official policy states that damage due to water submersion is not covered by the warranty. However, PRODIG offers a reliable support system, including a permanent warranty against "red ROM" issues (device blacklisting), for unexpected initial defects or problems.

Add peace of mind with a waterproof case! Recommended IPX8-compatible cases

If you frequently use your iPhone around water, it's recommended not to rely solely on the device's water resistance, but to also use a waterproof case. An IPX8-rated case can be completely sealed, making some models suitable for use in pools or at the beach.

Key points when choosing a waterproof case:

• IPX7 or higher waterproof performance (IPX8 preferably)

• Transparent film that allows touch operation

• Face ID compatibility

• Neck strap or lanyard included

Many options are available for 1000 to 3000 yen, making them ideal for temporary use during travel or leisure activities.

Summary | How to safely use a used iPhone 16

The IP68 rating of the iPhone 16 series offers reliable water resistance, but it's important not to misunderstand that it's "not completely waterproof." Caution is advised when using it in the bath, pool, or high-temperature, high-humidity environments.

If you're considering a used purchase, prioritize refurbished/warrantied products and condition checks, and buy from a reputable shop. Additionally, using a waterproof case can further enhance practical peace of mind.

PRODIG offers a wide selection of used iPhone 16s that have been checked for functionality and cleaned, allowing even first-time buyers to purchase with confidence. Inquiries about out-of-stock models are also welcome.

【iPhone 16 Series Product List】https://prodig-shop.com/collections/iphone-16series

【Purchase/Trade-in Inquiry】https://prodig-kaitori.com/