I bought the iphone4s, the contract machine of China Unicom. Why did it cost nearly 400 million traffic in 4 days? Is there any way to control it? What's the notice?

Hello, iPhone, as a smart phone terminal, needs network support for many functions. Here are some common ways to generate traffic:

1. Traffic generated by independent software (e-mail, weather, stock market, map, app store, Safari).

2. Software update information, software update

3. A large number of third-party software that needs to update data online. (QQ, great wisdom, etc. )

4. The advertising bar that comes with the software, especially the free software, will have the advertising function and will automatically download and play the advertising content.

5. Notification function, which pushes information through Internet traffic.

6. Email function. If you set up email, you will automatically receive email. Even if you turn off the mail receiving function in the settings, you will still download the mail information regularly.

7.iCloud will use cellular data to upload and download some content (e-mail, address book, calendar, reminders, bookmarks, memos, manuscripts and data, and find my iPhone).

8. For diagnosis and dosage, select "Do not send" in Settings → General → About this machine → Diagnosis and dosage.

To turn off stream generation:

1. Upgrade your phone to the latest iOS version.

2. Turn off Cellular Data in Settings-General-Cellular Mobile Network.

"Notification" is a function of iPhone, which is aimed at some applications with notification function. If one of your programs doesn't need to use this function, you can turn it off in Settings-Notification.

You can register a free account by registering an Apple ID. The following is the link to the registration method: /kb/HT2534? viewlocale=zh_CN