If we have more than 1 account in SmartOne IPTV application, it will load the first one in the list, if we want to set a custom account as a default account :
1 - Open SmartOne IPTV application.
2 - From Main Menu Goto Settings.
3 - Goto Accounts.
4 - Select Account and press BLUE button or select set default.
Now, when reload or lunching the application, the default account loaded will be the selected account before.