The situations of automatic disconnection are as follows:
1. Communication network problem: There is no way to solve it
2. Mobile phone signal reception ability: You can replace it with a better quality one
3. Internal signal conflict: Since the mobile phone sets the priority of the phone to the highest when the software is manufactured, when you have a call coming while you are performing other operations, the mobile phone will save the current status and then enter Call status, if there is a software problem, the saved status may be unstable and the call may be easily interrupted.
4. Hardware aging: Due to the call design decoder, converter, etc., the aging of any component can cause the call to be blocked.
Usually, in this case, you can go to the after-sales department for testing to find out what the cause is.
Secret function
1? Enter a keyword and all relevant entries in your notepad and text messages will be searched out, regardless of whether you have deleted them or not! Solution: Go to Settings → General → Spotlight Search → Check the boxes you don’t want to search → Remove.
2? You can set up your iPhone input method to turn phrases or abbreviations into any words you want. Open Settings→General→Keyboard→Add a new keyboard shortcut, but there is no Jiugongge input method
ps: Starting from iOS7 Beta4, the Chinese iPhone can select "Nineugongge" in the Simplified Chinese input method to enable Jiugongge input. .
3. If you want to save an image from a website to your phone, tap and hold the image until a menu pops up, then tap "Save Image" to save it to your phone.
4? You can switch the Do Not Disturb function in "Settings". Locking your phone while you sleep means you won't get notifications for messages or calls.
5. Use voice to compose text messages, that is, click the microphone icon on the keyboard interface, and you can type the corresponding text just by speaking to your iPhone. This function is very accurate.
6? You can enable the Emoji keyboard, Settings → General → Keyboard → Select "Add New Keyboard" → Scroll the page to find the newly added input method → ??Click Add. If you want to use emojis, tap a button on your keyboard that looks like a globe.
7? If you want to quickly close an application, you can double-click the iPhone's Home button and the application will exit the desktop, or press and hold an application's icon until it vibrates, and then click the red circle to close the app.
8. Every time you add new contacts, emails, etc. to your phone, you can connect to WiFi to back them up to iCloud. Go to Settings→iCloud Storage & Backup→Enable this feature.
9 If you are reading a long list and want to jump back to the top of the page, just click on the time displayed at the top of the screen.
10? Use the iPhone's clock program, which is a fairly tedious setup. There is actually an easier way, press and hold the Home button → until the Siri icon pops up → say "Set my alarm to anytime"!
11 You can control your music without opening a separate app. Double-click the Home button → scan desktop files → open music. The button on the far left can lock the horizontal and vertical orientation of the phone screen.
12When using the camera application, press the volume " " button to turn on the snap photo mode. Press the middle button and the power button at the same time to take a screenshot.