Go to Settings > General > About. To the right of "Model Number", you can see the Device Number (M number).
To see the the Model Number (A number) tap on the device number.
On the outside of your device
On an iPhone 8 or later, to find the Model Number (A number), remove the SIM tray and look in the SIM tray slot. Make sure that you're in a well-lit place to assist with reading. The model number is written on the side with the display.
On an iPhone 7 or earlier, an iPad, or an iPod Touch, you'll find the Model Number (A number) on the back of your device.
Where do I find the model number on my MacBook? X
On my device
Find the serial number, EMC number and model number printed on the underside of your Mac near the regulatory markings. It's also on the original packaging
next to a barcode label. EMC is the most accurate number to compare with our list as it takes into account the year of your device.
The original packaging might also show an Apple part number such as MNYF2xx/A ("xx/A" is a variable that differs by country or region and is not included on our
list so can be disregarded)."
Use System Information
Go to Apple icon > About this Mac > System Report. It will automatically be selected on the hardware tab (left side). To the right, the model name and model
identifier will be written on the first two lines."
Where do I find the model number on my Apple Watch? X
To find out what model watch you have, turn your watch on
1. Navigate to Settings > General > About
2. Next to model, it will show you the model number (A number)
3. Tap the model to see the device number (M number)
4. Compare your model number to our list
On my device
On the underside of your watch, you will see writing around the magnetic charging dome. You will be able to see the Watch series (e.g. Series 1),
the Watch size (e.g. 42mm), the Watch type (GPS or GPS+LTE) and on some devices the serial number.
If your LCD flex cable is torn or damaged on your Series 3 GPS + Cellular Apple Watch, this replacement flex may be what you need to fix it.
LCD Flex cables
12 Month Warranty
This Apple Watch LCD flex is not compatible with the 42mm GPS version or 38mm versions of the Series 3 Apple Watch
Microsoldering is required to install this part
Part Type: Flex Cable
Part Number: 821-01138
Included: LCD flex cables
Watch Size: 42mm
Watch Type: GPS + LTE
Warranty: 12 Months
How do I find my Model number?
Compatible Model Numbers
Apple Watch Series 3 GPS + Cellular 42mm
Model Number (A Number)
Series 3 42mm GPS+LTE Model NumbersHow do I find my Model number?
Device Number (M Number)
* Please note, to make searching the device number (M Number) easier, we have only listed the part numbers (First 5 characters), we have removed the region numbers as there is no difference in parts. For example, if "M Number" is "MC922LL/A". we remove the "region" portion and everything after (the "LL/A" at the end) leaving us with "MC922".
More info Less info
Watch the video above for assistance in completing this repair. It is similar for both cellular and GPS models except the cellular models have less parts to unscrew
Here is some tools you may need to help you complete the repair.
Here are some helpful tips to assist you in completing a safe repair on your device. If you are unsure of something or have any quesions, please feel free to contact us either by phone (0508 IGADGET) or by email
Always track your screws to avoid putting back in the wrong place and damaging your device. You can draw a picture of your watch and tape the screws to the right places or use a screw mat
Always power down your device prior to working on it
Make sure you always unplug the battery before attemping any component removal
When attempting to remove the screen, be careful not to push the blade or iFlex tool in too far or too hard, doing so may cause damage to the internal parts. Only 3mm depth is required to cut the adhesive. Draw a mark on your tool to help with depth management.
Test the LCD is functioning properly before sealing up the device
When removing the screen, it is very easy to tear the force touch gasket. We recommend having a spare force touch gasket on hand incase this happens to prevent issues after replacement.
Micro-soldering skills are required to complete this repair
What’s In The Box
1x Apple Watch Series 3 42mm GPS + Cellular LCD Flex Cable
Frequently Bought Together
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