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You can customize the SMS ringtone, and you need software to set the ringtone separately.

Simulator and mobile phone are two different things.

After installing some beautification software, the main menu can set the background.

I use facebook and twitter normally, but I have a 2. 1 mobile phone, and I don't know if 2.2 youtube will be normal.

Traffic is related to your usage habits. If the "My Location" location is turned on at any time, even if the traffic is rarely used, the traffic will flow away at a speed of five or six meters per day. If you don't locate at any time and save the use of software, tens of meters per month is enough. However, it is recommended that you don't buy a package with a flow rate of less than 100M. It is meaningless to play mobile phones without traffic.