How to enable Data Roaming in Jelly Bean 4.1 based Samsung Smartphones?
STEP 1. GETTING STARTED
a). Tap on Applications as shown below.
b). Now, Tap on Settings.
c). Under Settings, Tap on More Settings.
STEP 2. ENABLING DATA ROAMING
d). Under Wireless and networks, Tap on Mobile Networks.
e). Under Mobile Networks, Tap on Data Roaming.
f). A confirmation will will appear. Tap OK. Observe that Data Roaming has been enabled.