Question: how to transfer data from samsung galaxy s4 to samsung galaxy s4?
Answer: Download and install the Samsung Smart Switch app from Play Store on your new phone. ... 
Tap Next.
Tap I agree then Confirm.
Tap Skip.
If you have an iPhone and it's backed up to iCloud, tap Import from iCloud. ... 
You'll need to click Android to Galaxy on your old Android phone.
Tap OK.
Choose the content you'd like to transfer.