From the Network & internet screen, tap on Mobile network if you want to 
set your mobile data
•  Mobile data: if enabled, your phone accesses data using mobile 
network. Use the toggle switch 
 to enable or disable it.
•  Roaming: if enabled, your phone connects to data service when 
roaming. Use the toggle switch 
 to enable or disable it.
•  App data usage: displays app data usage
•  Data warning & limit: tap to view and set data warning, warning limit, 
and data limit.
•  Femtocell preference: tap to select 
  All open, closed or hybrid femtocells 
  No open, closed or hybrid femtocells
  Only device's or Operator allowed femtocells
•  Automatically select network: use the toggle switch   to enable or 
disable this function.
•  Choose network: displays the carrier name of the mobile data network.
•  Access Point Names: tap to view or select the APNs of your mobile 
data network.
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