Power and Volume Button Flex Cable
Samsung Galaxy A53 5G / A33 5G / S21 FE 5G / A73 5G Power and Volume Button Flex Cable Replacement
- Fits
- Samsung Galaxy A53 5G / A33 5G / S21 FE 5G / A73 5G
- Fixes
- Dead side buttons
- Quality
- Brand new, OEM quality
- Fitting
- Professional install
Overview
What this part is
These four Galaxy models all use a thin internal flex cable behind the power and volume keys. It links the keys to the main board. When its contacts wear or the cable is damaged, the keys stop working properly.
Each option in this listing is for the model named, so select your exact phone before adding it to your basket. This is the internal cable only; the outer button caps stay in the frame.
Compatibility
Specifications and compatibility
- Part
- Power and Volume Button Flex Cable
- Compatible with
- Samsung Galaxy A53 5G / A33 5G / S21 FE 5G / A73 5G
- Model numbers
- A53 5G: SM-A536B · A33 5G: SM-A336 · S21 FE 5G: SM-G990B · A73 5G: check Settings › About phone
- Does not fit
- Galaxy A52, A32, A54, A34, S21 or any model not listed in the options
- Fixes
- Power or volume keys that do nothing, stick or work only sometimes
- Does not fix
- Screen, battery, charging or motherboard faults, or physically broken outer button caps
- Quality
- Brand new, OEM-quality power and volume button flex cable. Tested before dispatch.
- Brand
- Unbranded, compatible with Samsung Galaxy A53 5G / A33 5G / S21 FE 5G / A73 5G
- In the box
- 1 × power and volume button flex cable for the model option you choose. Tools and adhesive are not included unless shown in the photos.
- Colour
- Not applicable (internal part)
- 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 key no longer wakes or locks the phone
- Volume keys do nothing or skip levels
- The phone opens the power menu or takes screenshots by itself
- Keys work only if pressed at one end
How to check your model
Open Settings › About phone and read the model name and number. Then pick the matching option: A53 5G (SM-A536B), A33 5G (SM-A336), S21 FE 5G (SM-G990B) or A73 5G.
The S21 FE is not the same phone as the S21. Check the name carefully.
Professional installation
How a technician fits this part
- Power the phone off and remove the SIM tray.
- Warm the back cover edges and lift it off.
- Remove the internal covers and disconnect the battery.
- Unplug the old button flex and ease it off the frame.
- Fit the new flex so each contact lines up with its key, then connect it.
- Reconnect the battery, test all keys and reseal 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
Which option do I need?
Check Settings › About phone and pick the option that matches: Galaxy A53 5G, A33 5G, S21 FE 5G or A73 5G.
Does it fit the Galaxy A52 or S21?
No. The A52 and the standard S21 use different side key flex cables. Only the four models in the options are covered.
Is one cable shared by all four models?
Not necessarily. Each option is for the model it names, so choose your exact model rather than assuming they are the same.
Is it made by Samsung?
No. It is a brand new, OEM-quality flex cable made to fit the model you choose, and it is tested before dispatch.
Should I fit it myself?
We recommend professional installation. The back cover is glued, and the battery must be disconnected before the flex cable is removed.
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 from £5.
Prepared by the Supreme Phone Parts team, Manchester. Last updated September 2026.