Why We Increased Our Refurbished iPhone Warranty from 12 to 18 Months

When we first started selling refurbished iPhones, a 12-month warranty was standard across most of the industry. Over time, our testing process, supplier consistency and long-term return rates improved enough that we felt comfortable extending that to 18 months.

Today, every refurbished iPhone we sell includes an 18 Month Warranty as standard. This article explains why we made that change, what buyers should actually expect from a refurbished device and why the refurbished iPhone 12 still remains one of the most sensible options for many buyers.

You can also browse our wider refurbished iPhone range or view all available used iPhones.

Why the iPhone 12 Still Remains Popular

The iPhone 12 was the point where standard iPhones started feeling properly modern again. It introduced the flat-edge redesign, OLED display and 5G support while still remaining noticeably cheaper than newer models.

For many buyers, it still offers one of the best balances between modern features, everyday usability and overall cost.

Compared to the iPhone 11, the jump to OLED is immediately noticeable in daily use. Compared to the iPhone 13 and newer models, the real-world difference for most users is smaller than many expect.

If you are comparing options, you can also browse the newer refurbished iPhone 13 range or compare with the used iPhone 14.

Why We Increased Our Warranty from 12 to 18 Months

Extending a warranty only works if long-term fault rates remain consistently low over time.

As our refurbishment process improved, we saw fewer issues across core areas like charging stability, battery reliability, Face ID performance and camera functionality. That gave us the confidence to move beyond the older 12-month approach and standardise an 18 Month Warranty across our refurbished iPhone range.

For buyers, the warranty is less about marketing and more about knowing the device has already been properly checked before resale.

You can read more about our refurbishment process here.

What We Actually Check Before Sale

Every refurbished iPhone is tested before grading and resale. This includes checks for:

• battery health and charging stability
• screen responsiveness and display condition
• Face ID and biometric functions
• cameras, speakers and microphones
• network connectivity and signal performance
• button responsiveness and charging ports

Devices are securely data wiped, cleaned and rechecked before dispatch.

Unlike buying privately, refurbished devices have already gone through a testing and grading process before reaching the customer.

Battery condition remains one of the most common causes of buyer dissatisfaction in the refurbished market, which is why we pay particular attention to it during grading.

Understanding Cosmetic Grades

Cosmetic grades only affect appearance — not functionality.

All grades are fully tested and fully functional, but some devices will naturally show more visible signs of previous use than others.

Most buyers choose Excellent condition because it keeps pricing lower while still looking very clean in everyday use.

You can read more in our guide to refurbished iPhone grading.

Refurbished vs Buying Used Privately

A used iPhone bought privately may initially look cheaper, but the condition, battery quality and testing history are often unknown.

A properly refurbished device has already been checked, graded and prepared for resale, which reduces the risk of unexpected faults shortly after purchase.

The warranty is part of that difference. It reflects confidence in the refurbishment process rather than simply reselling a used phone as-is.

For many buyers, battery condition and reliability matter more than saving a small amount upfront through a private sale.

Why Battery Health Matters So Much

Battery condition is one of the biggest concerns buyers have with refurbished iPhones, especially on older models.

That is why we check battery health before grading and resale. Devices supplied below our acceptable standards are not sold without intervention.

While many sellers work to an 80% threshold, at Used Mobiles 4U we hold devices to a minimum 85% battery health standard before resale.

If you rely heavily on gaming, video recording or intensive daily use, newer devices like the iPhone 13 or iPhone 14 may still offer better long-term efficiency.

How to Check Your Refurbished iPhone After Delivery

When your refurbished iPhone arrives, it is worth spending a few minutes checking everything before transferring your data across.

• check the cosmetic condition matches the grade ordered
• test Face ID and cameras
• check speakers and microphones
• connect to Wi-Fi and Bluetooth
• confirm charging works correctly
• check battery health under Settings > Battery > Battery Health

Most reputable sellers guarantee minimum battery health standards, typically 80% or above, but always ensure your device meets your chosen retailer’s explicit performance promises.

If you are moving from an older device, our guide explains how to transfer data from your old iPhone.

What an 18 Month Warranty Actually Covers

A refurbished phone warranty is designed to cover hardware faults rather than accidental damage.

Typical coverage includes:

• battery failure outside normal degradation (covered for 12 months)
• charging faults
• speaker or microphone issues
• camera faults
• Face ID or connectivity failures
• unexpected hardware defects

It generally does not cover:

• accidental damage
• cracked screens from drops
• liquid damage
• unauthorised repair attempts
• normal cosmetic wear over time

You can read more in our guide covering what refurbished phone warranties include.

Buying Refurbished Should Feel Straightforward

For us, extending the warranty from 12 months to 18 months was less about marketing and more about confidence in the consistency of the devices we supply.

Buyers should know what condition to expect, how devices are tested and what support exists if something goes wrong. That consistency is what we aim to provide across our refurbished iPhone range.

By keeping our testing, grading and warranty process straightforward, we aim to make buying refurbished feel far more predictable for buyers.

At Used Mobiles 4U, every device is tested, graded and supplied with an 18 Month Warranty for additional peace of mind.

You can browse our full refurbished iPhone range here, compare different used iPhone models or explore our available refurbished iPhone 12 devices.

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Written by James Waterston — 24 years in the mobile phone industry from customer service to Sales Director of a global repair & recycling company; now running Used Mobiles 4 U for 8+ years. LinkedIn