Power and Volume Button Flex Cable
Samsung Galaxy A21 Power and Volume Button Flex Cable Replacement
- Fits
- Samsung Galaxy A21
- Fixes
- Dead buttons
- Quality
- Brand new, OEM quality
- Fitting
- Professional install
Overview
What this part is
The power and volume keys on the Samsung Galaxy A21 press against small switches on a thin flex cable inside the frame, on the right-hand side of the phone. Over time the switches wear out, or the flex tears or corrodes after a drop or liquid damage.
This flex carries both the power switch and the volume switches, so one part fixes all three keys. Before ordering, check the outer keys are not jammed or missing, as this part replaces the internal flex only.
Compatibility
Specifications and compatibility
- Part
- Power and Volume Button Flex Cable
- Compatible with
- Samsung Galaxy A21
- Model numbers
- SM-A215
- Does not fit
- Galaxy A21s (SM-A217F), Galaxy A20, Galaxy A31 or any other model
- Fixes
- Power or volume buttons that do not respond, stick or act on their own
- Does not fix
- Broken outer keys, battery, screen or main board faults
- Quality
- Brand new, OEM-quality power and volume button flex cable for the Samsung Galaxy A21. Tested before dispatch.
- Brand
- Unbranded, compatible with Samsung Galaxy A21
- In the box
- 1 × power and volume button flex cable. Check the photos for any extra items.
- Colour
- As shown in the photos
- Installation
- Professional installation recommended
- Supplied by
- Supreme Phone Parts Ltd, Manchester, UK
Before you order
Is this the right part?
Signs it needs replacing
- The power button does nothing when pressed
- Volume up or down does not respond
- The buttons only work when pressed very hard or at an angle
- The phone restarts or changes volume on its own
How to check your model
Open Settings › About phone. The model name should read Galaxy A21 and the model number should start SM-A215. Samsung model numbers begin SM-.
This part does not fit the Galaxy A21s (SM-A217F), Galaxy A20, Galaxy A31. Compare your old part with the photos before fitting.
Professional installation
How a technician fits this part
- Power the phone off and remove the SIM tray.
- Warm the back cover edges gently and lift it off with a plastic pick.
- Remove the screws and inner cover, then disconnect the battery before anything else.
- Unplug the old button flex, then peel it carefully off the side of the frame.
- Fit the new flex in the same position, reconnect it and the battery, and test every button before closing.
- Refit the inner cover and screws, then refit the back cover with fresh adhesive.
Check that the part matches the device before fitting it or removing any adhesive backing. Once a part has been fitted, it cannot be returned for a change of mind. Faulty parts are always covered.
FAQ
Frequently asked questions
Will this fit my Galaxy A21?
Yes, if Settings › About phone shows Galaxy A21 and the model code SM-A215. It does not fit the Galaxy A21s (SM-A217F), Galaxy A20, Galaxy A31.
Does it fit the Galaxy A21s?
No. The Galaxy A21s is a different model with a different internal layout. Check the model name in Settings › About phone before you order.
Will it fix a broken button cap?
No. This part is the internal flex with the switches. If the outer key is cracked or missing, that needs replacing separately.
Is it made by Samsung?
No. It is a brand new, OEM-quality power and volume button flex cable made to fit the Samsung Galaxy A21, and it is tested before dispatch.
Should I fit it myself?
We recommend professional installation. The Galaxy A21 has to be opened, the battery must be disconnected safely, and the flex is thin and easy to tear.
How quickly will it arrive?
Orders placed before 4pm on a working day are dispatched the same day from Manchester by Royal Mail Tracked. Delivery is free on UK orders over £5. You can also collect from our shop at 33 Moulton Street, Manchester M8 8FQ.
Prepared by the Supreme Phone Parts team, Manchester. Last updated September 2026.