Hi Jro1407,
It's not possible using PlayMemories Mobile. Even if [Transfer Image Size] is set to [Original], RAW / uncompressed images are always transferred as JPEG images with the pixel size reduced to the same size as when [2M] is selected.
For further assistance, please contact the Sony offices/Sony representative offices nearest to your place of residence in Asia Pacific region at http://www.sony-asia.com/locale-selector?hpid=countryselector:AsiaPacific. Due to proximity, they are in a better position to respond to your questions or concerns.
If my post answers your question, please click the "Accept as Solution" button.
Regards,
-Anthony