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Hi guys do the s3 non cellular and s3 cellular share the same digitizer as I have a broken screen on my s3 cellular and have a new S3 non cellular I can take the digitizer off to put on me s3 cellular thanks Kev

First you don’t want to replace the digitizer alone! All you do is kill the display part. The full display assembly needs to be replaced. Follow this guide Apple Watch Series 3 Screen Replacement You’ll find the needed part within the guide and no you need to stick with the correct unit.