Where is the Apple 4S mobile phone signal port

4 black lines on both sides of the middle frame.

On the left side of the picture is the antenna of Bluetooth wifi GPS, because their communication frequencies are all together, so the antennas are shared. The 3G and 2G antennas on the right are disconnected from the antennas on the left due to the different frequencies, and the antennas cannot be shared.

The metal bezel on the iPhone4 is actually the antenna, so there is the notch you said. To add to this: holding the antenna of any phone tightly will be affected by signal attenuation, but the iPhone 4 has increased the degree of attenuation by moving the antenna to the side, coupled with the wrong signal display algorithm, which magnifies the severity of the problem, resulting in 4"Antenna doors"。

It is precisely because of the 4 antenna gate incident that Apple added an antenna inside the 4S when it came out of the 4s, and at the same time greatly changed the internal circuit wiring, which greatly weakened the impact of handheld on the antenna. Therefore, the difference between 4S and 4 is by no means the difference in the number of notches, or that the number of notches is the same, they are all two antennas, the difference in their appearance is: above the volume adjustment button on the left side of the fuselage, next to the audio jack, and at the bottom of the right side of the fuselage, there is an extra "black line".

Apple 4S Poor Signal Problem:

1: The local cellular network signal is not strong.

2: The network setting of the system version is incorrect.

It is recommended to restore network settings.

The operation is:1Click "Settings" on the main interface of the machine and turn on "Airplane Mode".

2.On the Settings page, open General and select Restore

3.Select Reset network settings.

The position of the antenna has been changed.

Antennas next to the 4S and 4 headphone jacks.

The Apple 4S signal is working well overall and can be used normally:

First, there are two reasons for poor network signal, operator problems and users' own problems, but due to SIM card reasons, they cannot be troubled by their own replacement test for the time being.

Second, it is recommended to call**operator customer service**: China Unicom 10010, China Mobile 10086 for feedback, and ask the relevant departments to check whether it is a local network problem, and go to the business hall to test the SIM card.

Third, if the reason of the operator is ruled out, then it is a problem with the mobile phone, and it is recommended to contact the iPhone after-sales service in time to negotiate and solve it.

It depends on where you are, but if you're in some densely populated areas, the signal must be poor. I've tried, experienced.

So-so, it's a little worse than the average Huawei ZTE phone.

Must be 5 squares full, minimum 4 squares.

Reasons for not having a mobile signal:

1. The problem of the operator, in general, this possibility is relatively large. In this case, call ** to 10086 to complain, it will be better.

2. The mobile phone does not receive a good signal, and this possibility is generally very small. Generally, it will not appear, and if the mobile phone has been used for a long time, it is easy to appear this possibility.

3. There is no mobile signal coverage in the area, so it will also lead to no signal.

There are a lot of problems, after changing the 4G card, there are some that need to be reopened to roam in other places, and the mobile is now more and more 2.

You first call ** consultation 10086, explain the problem clearly, and see if it can be solved for you. If not, go to the business hall.

Use the elimination method first to see if it is a network problem or a problem with your terminal.

At the top end, a small round hole, as shown below:

Advantages: Its functions are extensible, and there is a lot of 3-party software support, which means that it can download a lot of software (but most of it is in English. Chinese is relatively small), and the game is also very fun (the game screen is comparable to PSP, but the control cannot be surpassed, after all, it is touchscreen.

And the 4th generation is really stylish in appearance.

Do you mean antennas? On the left side of the phone, the silver border.

4s are notoriously bad signals. If you have to solve it, you have started from the following aspects.

Let's start by looking at the carriers. Mobile Unicom Telecom, which one you use, which operator you often haunt has the best signal, ask a friend and a colleague, and then change the number.

The second point is that the mobile phone should not be equipped with a metal shell, which will affect the normal play of the mobile phone antenna.

Third, let's change your phone

3The metal frame of all iphone5s is the location of the antenna that receives the signal, and the appearance looks like two small white bars on both sides, thin.

As illustrated; Mobile phone signal amplifier (professional name: repeater) consists of antenna, RF duplexer, low noise amplifier, mixer, ESC attenuator, filter, power amplifier and other components or modules composed of upstream and downstream amplification links. The basic principle of its operation is:

The forward antenna (donor antenna) is used to receive the downlink signal of the base station into the repeater, and the useful signal is amplified through the low-noise amplifier, the noise signal in the signal is suppressed, and the signal-to-noise ratio (SN) is improved. Then it is downconverted to the intermediate frequency signal, filtered by the filter, the intermediate frequency is amplified, and then the frequency is shifted to the radio frequency, and then the frequency is amplified by the power amplifier, and the backward antenna (retransmission antenna) is transmitted to the mobile station; At the same time, the backward antenna is used to receive the uplink signal of the mobile station, which is processed by the uplink amplification link along the opposite path: that is, it is transmitted to the base station through the low-noise amplifier, downconverter, filter, mid-amplifier, upconverter and power amplifier. So as to achieve two-way communication between the base station and the mobile station.

There could be a number of reasons:

1.Signal problems: Surrounding buildings with large stools or in enclosed spaces.

2.Locked: Although the card can unlock the network, it will affect the quality of calls and Internet access.

Solution:1Go to an open area and try to talk, if the tour notice is not restored, you can click the green Late Grinding Brigade button in Settings - Airplane Mode, and repeat the click twice.

2.The locked machine can be unlocked through the repair point.

3.Update Carrier: Settings - General - About This Mac, wait for about three seconds, if the carrier update pops up, install the update.

1. Check whether the current mobile phone signal is good, if the mobile phone is not well-spondled, it will show no service.

2. There may be problems with the mobile phone system, it is recommended to restart the mobile phone or restore the network settings.

3. Check whether the mobile phone card is inserted well, and it is recommended to try to insert the card again.