What s going on with iPad not activating cellular data

Since China Unicom's WCDMA 3G network is not yet perfect, you should turn off the 3G and cellular data settings, and you can only play ** but the call quality is the best. iPhone4 won't show up"3g"or"e"。

Usually, 3G and cellular data are only turned on when you need to surf the Internet, which ensures the needs of voice calls, and also saves the power of the mobile phone to ensure the battery life!

If you often have "not activated cellular data network", the reason should be that the local 3G signal is not strong. Please select"Turn off 3G"and turn on Cellular Data.

Here's how to solve it:

1. Turn on "Data Roaming", and you may be able to use a cellular data network from another carrier if it is not within the coverage area of the carrier's network. In Settings, tap Cellular Data and turn on Data Roaming.

2. Create a cellular data plan (3G Internet settings) on your iPad, and in "Settings", click "Cellular Data - APN Settings". If it is a 3G card of China Unicom, fill in "3Gnet" in the APN; If it is a China Mobile card, fill in "CMNET" in the APN, and China Mobile's card only supports GPRS and EDGE.

4. Monitor the used traffic of the cellular data network, and in "Settings", click U General - Elapsed Time. In the "cellular network data" can be displayed "send" and "receive" data meteors, for users who pay monthly meteors, this statistic is still very useful, when the "receiving" meteors are close to the upper limit of the monthly meteors, you can use less ipad to surf the Internet, so as not to incur high Internet fees.

5. Click "Restore Statistics" to clear the meteor statistics, and users who subscribe to the Internet should remember to clear it once on the 1st of each month.

It is caused by a setting error, and it is OK to restore the network settings, and the solution is as follows:

1. First on the iPad desktop, find Settings and click on it, as shown in the image below.

2. After entering, you can see the "General" option on the left, click General, as shown in the figure below.

3. Then scroll down and see the "Restore" button, as shown in the figure below.

4. After entering the restore page, you can see that there is a blue option that is "Restore Network Settings", click on this option.

5. At this time, a page will pop up, enter the password of the device, as shown in the figure below.

6. Finally, you will be asked to choose whether to restore or not, click Restore, as shown in the figure below, and it is done.

1. First, open the tablet and click on the set-up eggplant icon, as shown in the figure below.

2. After entering the settings interface, click on Wi-Fi, as shown in the figure below.

3. After clicking Wi-Fi, turn on Wi-Fi on the right side of the page, as shown in the figure below.

Select the wifi username you want to connect to.

5. The page jumps and clicks to join this network.

6. The page pops up the password input box of Yun Tangerine, enter the wifi password, and click to join.

7. A tick will appear in front of the wifi username that needs to be added, and the wifi icon will appear in the upper right corner of the page, as shown in the figure below.

You can try to reset your cellular settings:

1. Go to Settings and select General.

2. After entering the general, slide to the bottom and click Restore.

3. Select Reset Network Settings. The phone will automatically shut down and reset the network settings.

4. After the automatic restore is completed, the phone will restart automatically.

5. If it still doesn't work, you can call ** to ask mobile customer service to confirm whether your number has enabled the Internet function. If not, ask the customer service to help you activate the Internet function, so that you can go online.

Network recovery can be done by restoring network settings:

1. Click Settings to enter Settings;

2. Scroll down, select General in the settings interface, and click;

3. Scroll down, select the restore option in the general interface, and click;

4. Select Restore Network and click;

5. After the restoration is completed, select the cellular network and restart the cellular data.

6. Check whether the upper left corner shows 3G or 4G network, which shows and indicates that the network is in normal use, if it is still not available, it is recommended to contact after-sales service for testing and maintenance.

Reason: If the previous ** is 2G, according to the rules of China Unicom, when the monthly traffic reaches 6G, it will be capped, and there will be "Failed to activate cellular data."

PDP Authentication Failed".

Solution: Call China Unicom customer service 10010, cancel the traffic cap through manual service, and restore the Internet function after restarting the mobile phone.

Expand your knowledge: Cellular data, that is, from data transmission to exchange, adopts packet technology, and the user is equipped with a wireless packet modem.

Entering the packet network through a dedicated packet base station can access the host and database on the packet network, and can also call another mobile data terminal. This technique is mainly used by specialized mobile data communication slow attack banquet information systems, which can only provide mobile data users with a connection to packet-switched data network users.

Cellular Digital Packet Data (CDPD) is a mobile packet data technology used on the spectrum of cellular** networks such as AMPS. CDPD is characterized by the ability to utilize any free channel in the cell through channel hopping without affecting the voice traffic of the underlying cellular system.

The basic components of CDDPD are the terminal system (ES) and the intermediate system (IS).

In Internet terminal technology, ES is equivalent to the host and IS is equivalent to the router. ES is the actual physical and logical end node for exchanging information, while IS is the basic structure for CDPD to store and transmit information.

There are two forms of ES: one is the mobile ES (M-ES), which is a device that the user accesses the CDPD network through a wireless interface, and the other is the fixed ES (FES), which is used by the general host, server or gateway to connect to the backbone of the CDPD and provide access for special applications and data.

A MES consists of a mobile terminal (PC or other standard device) and a CDPD wireless modem, which is connected to the mobile terminal and manages the wireless links and protocols. Typically, communication between wireless modems and mobile terminals is supported by standard serial protocols, such as Serial Line Internet Protocol (SLIP) or Point-to-Point Protocol (PPP).

There are also two forms of IS: one is general IS, which is a simple router (in most cases, an IP router) that does not contain CDPD and mobile components, and the other is mobile data IS (MD IS), which is a dedicated IS that can deliver messages according to the status of M ES at the current location.

MD IS consists of a set of hardware that provides functions such as exchange, accounting, registration, authentication, encryption, and mobility management. Mobility management software allows switching systems to track MES and allows M-ES to use unique network addresses.

1: The local cellular network has poor signal and unstable connection.

2: The system network settings are 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.

Turn on cellular data and still can't get online:

1.Restart your iPhone.

2.Settings-General-Restore above, check the WAP access point profile if there is a suggestion to remove.

3.To reset network settings, tap Settings> General > Restore, then scroll down and tap Reset Network Settings.

4.If you put this SIM card in another mobile phone, whether you can access the Internet, and whether you can go to the Internet when you put other SIM cards in this iPhone, so as to further rule out whether it is a problem with the mobile phone or the SIM card.

5.To reset all settings, tap "Settings> "General" > "Reset", then scroll down and tap "Reset All Settings".

6.If you still can't get online, and confirm that it is a problem with your phone, you can back up your data, turn off Find My iPhone, and then restore your iPhone system.

Go to your own settings, click on network settings, there is a wifi, just let it turn on, it will automatically find the network.

Specifically, it can be done in the following ways:

Method 1: 1If your iPad is connected to a wireless network, the network icon appears as normal, but it can't access the Internet.

At this time, you can open the "Settings" Wi-Fi of your iPad and find the "blue arrow" on the right side of the wireless network you have connectedNext, click "Ignore this network" at the top of the right pane, note: "Ignore this network" means to delete the configuration of the currently connected wireless network from the iPad system, and it will not affect other data and settings.

3.Then we will be asked if we want to ignore this network, we click on "Ignore", 4Finally, in the wireless settings, find the previous wireless network, reconnect and enter the corresponding wireless password.

Method 2: 1Start by finding Settings on your iPad,2

Then click "General" on the left, swipe up with your finger in the right pane to find "Restore", and click to enter 3Next find "Reset Network Settings", 4Then, click "Reset Network Settings", and we will be prompted that this operation will "Delete all network settings on your iPad and restore it to its factory state" Note:

Resetting network settings will only restore network settings and will not affect other settings and data5Click "Restore" and the system will initialize the network settings. Next, we find our wireless network in Wireless, enter the corresponding wireless password, and reconnect.

Method 3: 1If you have tried both of the above methods and still can't connect to the network, then you can conclude that the reason for the iPad itself is ruled out.

At this time, it is recommended to disconnect the power supply of the router and plug it back in again to force the router to restart. 2.There is also a relatively rare situation, that is, you can change the "channel" value in the "wireless settings" of the router, and then the router will restart and reconnect to the wireless network.

3.In the end, you can try to change a router. Of course, the iPad can connect to other wireless networks.

Note 1There are many restores in the restore, such as factory reset, etc., so when restoring the network, don't choose the wrong one.