I use Apple's 4th generation mobile phone, and I can't use anything. I just called and sent a text message, and the phone bill was deducted 100. What happened?

Apple needs to keep in touch with the Internet. If nothing is turned on, it will take away a lot of traffic. I suggest you download some traffic monitoring software, or use the following methods: 1 Turn off the "notification" function in iPhone settings to reduce automatic networking.

2. Turn off the "Push" function of "Get New Data" in "Mail, Address Book and Calendar" and set the "Get" function to "Manual".

3. Turn off location services in General Settings.

4.4. The App Store user name was cancelled to avoid the software automatically searching for updates.

5. Turn off the remote picture display of the email, reopen it if necessary, or try to process it on the computer.

6. Use a wireless router at home or in the office, install software and watch videos only in the Wi-Fi environment.

7. When Wi-Fi is available, turn off EDGE and 3G in the network settings.

8. After leaving the wireless hotspot, Wi-Fi will automatically switch to 3G or edge connection to download. At this time, you must remember to pause the online download.

9. Prohibit pictures when opening a webpage with safari.