This is not the issue. It's any media attached.. Regardless of size. Same things send fine from the tablet and my coworker's GS4. As stated, I've worked for a VZW retailer for 3 yrs+ So I understand limits there. even small items in an email Signatare. 1 have to remove them from the reply or it fails. Every phone... GS3 Rezound -... etc.. nowhere near 20MB. Files under 1MB even fail if they're media.