【Illustration】How to Repair a Loose Smartphone Ring

Do you know what a “smartphone ring" is?

It’s the thing you sometimes see attached to the back of smartphones to prevent them from falling off by putting a ring on the finger that holds the phone. It’s also called a “bunker ring."

Actually, these rings tend to become loose quite easily, and as I researched, I couldn’t find any good repair methods in the numerous (and often irrelevant) articles available.

This time, I want to share my own thoughts and an effective solution that worked for me.

What is a Smartphone Ring?

First, let me briefly introduce what a smartphone ring is. (You may not need this, but just in case.)

A smartphone ring is a ring attached to the back of a smartphone or smartphone case, as shown in the image at the beginning. It is used by placing it on the finger when operating the smartphone.

As smartphones have become larger than the palm of the hand over the years, the risk of dropping it while operating it with one hand is high. Smartphone rings are used to prevent such accidents.

In addition to preventing drops, the ring can be used as a smartphone stand by fixing the angle, making it convenient for watching videos on the desk, for example.

The Ring Became Loose!

While smartphone rings are quite useful as stands, the part that fixes the angle of the ring has durability issues. Even inexpensive ones become loose after a few weeks, and even expensive ones may become loose after about half a year.

My smartphone ring had become loose, as shown below, and it became unusable as a stand.

There are many articles addressing similar issues, but I couldn’t find any helpful ones.

So, I thought about the structure of the smartphone ring, and based on that, I looked for repair methods.

Here’s the backstory of why I bought this case.

Why Does the Ring Become Loose?

When something is broken, it’s good to carefully examine the structure to identify where the issue lies and then think about how to deal with it.

Although the smartphone ring cannot be disassembled, and I could only observe it, I assumed it had the following structure:

In short, it’s just a ring attached to a round part through a metal bar.

From this, it can be predicted that the adjustment of the ring’s angle relies on the friction between the ring and the metal bar. Therefore, when the ring wears out, and the friction decreases, the ring becomes loose.

From the above, it can be concluded that the cause of the smartphone ring becoming loose is the reduced friction of the metal bar. It seemed that restoring the friction in some way would fix the loose ring.

Let’s Use Threadlocker

One method to restore the friction of the metal bar is to use threadlocker, a type of adhesive that becomes hard when tightened, often referred to as “thread locker."

This adhesive can be bought on Amazon, among other places, but it’s usually cheapest to buy it at a home improvement store.

I poured the threadlocker into the metal bar of the ring.

I poured it to get into the gap… and waited a few seconds.

The adhesive entered the gap between the ring and the metal bar, restoring the friction. The smartphone ring was fixed!

Afterwards, even when I placed the smartphone as a stand, it worked properly. I could now easily watch Youtube on the desk as before.


While smartphone rings can also be used as stands, they lack durability because they rely on friction alone to support the smartphone.

In this case, using threadlocker on the loose smartphone ring was an effective way to revive its function as a stand.

You can get threadlocker at a home improvement store, so if you’re facing a similar issue, I hope you find this information helpful.


Posted by soya