Power and Volume Button Flex Cable
Samsung Galaxy A21s Power and Volume Button Flex Cable Replacement
- Fits
- Samsung Galaxy A21s
- Fixes
- Dead buttons
- Quality
- Brand new, OEM quality
- Fitting
- Professional install
Overview
What this part is
The side buttons on the Samsung Galaxy A21s press against small switches on a thin flex cable inside the frame. Over time the switches wear, or the flex tears or corrodes after a drop or liquid damage, and the power and volume keys stop working properly.
This part replaces the internal flex cable. Check that the outer keys are not jammed or missing before ordering, and compare your old part with the photos.
Compatibility
Specifications and compatibility
- Part
- Power and Volume Button Flex Cable
- Compatible with
- Samsung Galaxy A21s
- Model numbers
- SM-A217F
- Does not fit
- Galaxy A21, Galaxy A20s 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 A21s. Tested before dispatch.
- Brand
- Unbranded, compatible with Samsung Galaxy A21s
- 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
- The volume buttons do not change the volume
- The phone turns off, restarts or changes volume on its own
- The button feels normal but gives no response
How to check your model
Open Settings › About phone. The model name should read Galaxy A21s and the model number should start SM-A217, not Galaxy A21. Samsung model numbers start SM-.
The Galaxy A21s (SM-A217F) is a different phone from the Galaxy A21. Check the name includes the "s".
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 the back cover off with a thin pick.
- Remove the screws and inner cover, then disconnect the battery before anything else.
- Unplug the old button flex and unclip it from the side of the frame.
- Fit the new flex in the same position, reconnect it and the battery, and test every button.
- Refit the inner cover and screws, then fit the back cover with new 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 A21s?
Yes, if Settings › About phone shows Galaxy A21s (model SM-A217F). It is not listed for the Galaxy A21 or Galaxy A20s.
Does it fit the Galaxy A21?
No. The Galaxy A21s (SM-A217F) is a different phone from the Galaxy A21. Check the name includes the "s". Check Settings › About phone before you order.
Will it fix a broken button cap?
No. This part is the internal flex with the switches. If an outer key is cracked or missing, that is replaced separately.
Is it made by Samsung?
No. It is a brand new, OEM-quality part made to fit the Samsung Galaxy A21s, and it is tested before dispatch.
Should I fit it myself?
We recommend professional installation. The Galaxy A21s has to be opened with heat and a pick, the battery must be disconnected safely, and the flex cables are 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.