Not every user knows how to set up a SIM card on a tablet. Many tablet computers are equipped with at least one SIM card. Sometimes situations arise when the tablet does not recognize the SIM card. Manufacturers are gradually expanding the functionality of devices. Modern tablets make it possible to make voice calls and send SMS. Mobile operators are developing new tariffs. SIM card chips are being improved and the speed of mobile Internet is increasing. Why doesn't the SIM card work in the tablet? Today we’ll talk about what needs to be done in such a situation.
The tablet does not see the SIM card, what should I do?
When the tablet does not see the SIM card, the first thing to do is to find the cause of the problem. The problem may periodically remind itself. For example, the network does not connect to the SIM card. Or the Internet does not work - the network was not found.
There are several reasons why SIM cards malfunction:
- operating system failure;
- mechanical damage to electronics;
- careless handling by the user.
The main reasons why the tablet does not see the map:
- a software glitch occurred;
- the SIM card is damaged;
- the operating system was updated incorrectly;
- activation of flight mode;
- no 3G or LTE;
- data transfer disabled;
- poor quality firmware;
- the tablet computer is infected with viruses;
- the connector is broken;
- The communication module burned out.
First of all, the gadget needs to be rebooted. In some cases, such simple actions help solve the problem. Try installing the SIM card in another device. If the SIM card is recognized in another gadget, then the tablet is faulty. The drastic method to solve the problem is to reset to factory settings.
Causes
Broken connector
As mentioned above, trying to insert a SIM card the wrong way around or cutting it yourself may cause damage to the connector, contacts or cable connecting the slot to the motherboard. Self-repair is possible, but it is unsafe and will most likely lead to a complete loss of functionality of the device. We recommend contacting a service center and entrusting this to specialists.
Communication module burned out
The GSM module is an important part. This chip is responsible for communications: SMS and calls. It is better to entrust the repair of this component of the tablet to professionals who will check the antenna connection and diagnose the power circuit. You need to understand that the services of a service center on this issue will not be cheap.
Before contacting the service, check to see if it is definitely not working:
- Charge your tablet to 100% and reboot,
- perform a full reset to factory settings,
- reflash the gadget with the official version of the OS.
A failure in the GSM module is typical for cheap gadgets of dubious build quality (dns, prestige multipad, dexp, digma, explay, supra).
The operator has blocked IMEI
If you ordered equipment through a Chinese online store or purchased it second-hand from a pawnshop, then be prepared for problems with blocking using the IMEI code. Without it, it is impossible to carry out any type of communication. To check, dial "*#06#". If your number is blocked, you cannot do without the intervention of a specialist.
It happens that after a custom flashing the identifier is reset. This especially affects little-known Chinese manufacturers who do not care about updating the OS. In this case, you can restore IMEI only through the engineering menu or using an application with root access. This code is always indicated on the packaging and the device itself.
The device is infected with a virus
The rarest case of SIM malfunction is that your device is infected with a virus. More often, it’s the other way around: there is an active use of mobile resources, an attempt to copy passwords, gain access and write off funds from the balance, from bank cards and other valuable information.
If the device worked properly and saw the SIM card, but after installing an application a failure occurred, remove it.
Conduct a full scan with a reliable antivirus program. Make sure your antivirus is always turned on and updated.
What to do if the SIM card does not work?
Check if you installed the card in the slot correctly. It doesn't matter what Tele2 or MTS SIM card you have. You need to insert the SIM card carefully. If you need a different SIM format for full operation, you need to contact a mobile phone store. Don't know where to buy a Yota SIM card for your tablet? On the VsemSimki online store website you will find cards of all formats. What not to do? Try to cut the SIM card yourself. If you do not fit the card correctly, the chip will get stuck in the slot. As a result, the operation of the Sim reader will be disrupted.
If the tablet does not read the card that you cut yourself, you should contact a mobile phone store for help. The SIM card can be replaced while keeping the number. When the tablet does not see the map, it is impossible to use the Internet. If, for example, the Beeline SIM card for the modem does not work, you need to act differently. Check your access point settings. It can be configured if necessary. Information on settings can be found on the official website of your operator or by contacting technical support. If your tablet computer does not read the card, you can use another option. It's worth trying to clean the contacts with an eraser. They are located on the yellow SIM card chip. Very carefully use the tip of the eraser to clean out the recesses of the card. Blow off any remaining eraser and place the card in the slot.
Incompatibility
Often the tablet does not see the SIM card due to a simple size mismatch. Manufacturers produce several SIM card formats:
- Nano;
- Micro;
- Standard.
We advise you to read the technical specifications at the stage of purchasing equipment.
What to do if the tablet does not see the SIM card due to the wrong size? Don't worry! You will have to do the following:
- Contact the sales office;
- Ask the employee to change the card - this service is free;
- Don't forget to take your passport with you;
- Be sure to check that the SIM card size matches the slot size.
Note! You should not try to cut the SIM card yourself - you risk damaging the chip!
Support 3G and 4G LTE mode
Another simple way is to check the modes. To work in a tablet, the card must support 3G and LTE networks. All SIM cards of the latest generations can support these standards. Therefore, most often the problem of lack of connection occurs on outdated cards. In addition, you need to check the signal level in the place where you want to connect. We go to the official website of the operator. We check the signal according to the coverage area. You can also contact a mobile phone store for help. If necessary, a SIM card with an updated chip will be issued. Do not rush to change Megafon SIM or MTS card. You may be using an outdated device. Therefore, the tablet does not “read” 4G signals. If the gadget does not support this communication format, it needs to be replaced. Alternatively, you can set up 3G.
Device Settings
If all physical parameters are met, but the tablet does not see the SIM card, how to set the correct operating mode? The first reason for the malfunction is the lack of the required software version:
- Open your device settings;
- In the “General” section, find the “Updates” button;
- Run a search for the latest firmware;
- If necessary, download the appropriate update.
Some devices do not have an automatic network search; you will have to do it manually:
- Open settings;
- Find the section “Connection/Connection/Networks and Internet”;
- In this block you will find the “Network Search” button;
- Launch and find your operator.
Checking airplane mode
Airplane mode is available on all modern devices. If you enable the option, all types of received signals will be deactivated. The tablet computer will work autonomously. When airplane mode is turned on, the corresponding icon will be displayed at the top of the screen. To enable or disable the option, go to the quick commands panel. Checking the status of the symbol. Usually the icon is made in the form of an airplane. If the mode is enabled, it must be deactivated. Now try going online again. If the option is enabled, the tablet computer will automatically disconnect from communication lines.
Software failures and methods for eliminating them
A rather difficult situation is when, for example, a Lenovo tablet does not see a SIM card that is known to be working. What to do in this case?
- Contact the store with a reasoned complaint about a malfunction of the device.
- Check the firmware version yourself for compatibility with your device.
- Uninstall third-party software.
- Perform a hard reset of the device, first saving the necessary data to the memory card.
If there are no positive results, seek help from a specialized workshop. Calm down, the flashing process is a fairly quick and relatively inexpensive procedure for this type of electronics such as a tablet.
Setting up data transfer
Data transfer is needed to access the Internet via 3G and 4G LTE. These signals take a lot of charge from the tablet's battery. Therefore, on some gadgets this function is enabled independently. You can activate the option through the command panel of your tablet computer. The icon resembles an antenna. Data transfer can be configured in the settings menu. We find a category called “Communication and Signals”. Next, look for the “Data transfer” item. Here you need to enable the option. The following problem is typical for Chinese devices. The tablet sees the map, but cannot connect to the network. Let's consider the solution to the issue. By default, the device is configured with the settings of Chinese providers. We set the settings manually. To do this, select the desired cellular operator.
Solution options
The key to solving any problem is determining cause and effect. As mentioned above, in the situation under consideration there may be several main reasons. Therefore, the first thing any user needs to do is to reliably determine what exactly affected the performance of the device.
The tablet is new and/or has not been previously used with a SIM card
First, you need to refer to the documentation (user manual) and familiarize yourself with information about what restrictions there are (and whether there are any) when using the tablet in a similar role. If there are no restrictions, then you should visually inspect the SIM card for mechanical damage, and also make sure that it is inserted into the slot correctly. It's a small thing, but it happens. It would also be a good idea to try using the SIM in another device to make sure it works. Particular attention should be paid to the integrity of the SIM in cases where already outdated models are cut to modern standards with their own hands, and often these careless actions lead to its damage. The best option would be to contact your operator’s mobile phone store and get a new card with the same phone number.
Previously used
The solution options are standard for such a situation, namely:
- Carefully remove the card and inspect it and the slot for it on the device for damage.
- Reboot your device and make sure that .
- Check to see if you have Airplane Mode enabled, which is blocking the communication line.
- Check if data transfer mode is enabled in your operating system settings.
This point is worth paying special attention to, since it was previously mentioned that “Chinese gadgets” can be supplied without pre-installed settings or can be configured exclusively for “local operators”. Therefore, you should disable automatic search in the network settings and enter the appropriate operator settings manually. You can find them on the official website of the mobile operator or in the SIM documentation.
- Try turning off your wireless connection (if it is enabled). It is possible that prioritization is set in the settings, and access to the mobile Internet is simply not available.
- Check for updates for your tablet's operating system; perhaps the problem is widespread and has been fixed in the latest patches.
- Make sure that the operating system does not contain software that could theoretically affect the correct operation of the module. For example, various “dialers”, which are in abundance both in official stores and from third-party developers. In particular, you should pay special attention to checking for virus software by installing appropriate antivirus applications.
Updating the system
Updating the OS is an effective way to eliminate malfunctions and glitches. If the operating system on your tablet has not been updated for a long time, you need to reinstall it. Sometimes, due to software glitches, problems arise with the operation of the SIM card. You can make an update through the gadget settings. As a last resort, we try to reset all settings. Press and hold the volume button and the power button. After the Hard Reset procedure, all information from the tablet will be deleted. Therefore, make a backup copy first.
Software glitch
If your SIM card slot is absolutely working, the chip fully matches it, but the gadget still does not see the network, then perhaps the reason is a software malfunction. If you bought the tablet in a store, then go there and ask them to fix the problem. You can independently check the firmware version for compatibility.
Try to find the new software version in the tablet settings and update the device.
Also look to see if there are any questionable applications installed on your tablet. Remove all third-party software and check your device for viruses. Try to do a hard reset of the gadget, but before doing this, save all the content and personal data to a flash card. If none of the methods help, contact customer service to flash the tablet firmware via a USB cable.
Special connectors
Tablets with slots for micro SIM cards are becoming increasingly popular. An example of such tablets is a Samsung device. Apple devices require a special format - sa-SIM cards.
Some latest tablet models, for example, Lenovo, have a “cunning” design of the receiving tray. There is only one there, but it is divided into two sections. The size of the card determines where to insert it. The slot for a smaller SIM is marked with a marking picture. Be careful!
SIM reader slot serviceability
Using a SIM card format that is not suitable for the slot size leads to disastrous results. If you repeatedly try to fit a larger or smaller card, there is a high probability of damaging the connector itself.
You can remove the back cover and unscrew a few bolts located around the perimeter of the rear case, disconnect it and see damage or missing contacts on the SIM readers. Then you need to replace them with new ones by contacting a workshop to restore your Lenovo tablet.
Consequences of haste
Many gadget users damage their devices themselves. After purchasing a tablet and connecting the starter package, you need to insert a SIM card into the gadget. Sometimes people make mistakes and insert it the wrong way or the wrong size chip, using force.
The internal contacts of the SIM receiver are very sensitive and can easily bend or break. You should never insert anything by force, because fixing a SIM receiver costs a lot of money.
How to make a micro-sim or nano-sim
Mobile operators keep up with the times and sell chip cards with an imprint. What does it mean? This means the presence of special grooves on the plastic part of the card to independently transform it into a micro-SIM card. And this format is supported by most tablets of the latest year.
If your SIM card dates back to the times when phones could only make calls (imagine!), then you can adjust its size yourself.
What you need for this:
- SIM card of traditional form factor
- Stationery knife or scissors
- Sharpened pencil
- Ruler and...PATIENCE!!!
How to proceed? Draw new boundaries on the plastic field with a pencil. The new dimensions must strictly comply with the parameters 15 x 12 mm. Cut one end diagonally and sand the edges with very fine sandpaper. Proceed with extreme caution and take your time.
Remember!
Damage to the metal plates on the card will inevitably lead to its damage. Then you will have to restore the card again at the service center of your mobile operator. There is an automatic card cutting service available at a specialty electronics store. They are very inexpensive. If you are not confident in your abilities, you should go there for pruning.
Nano SIM is 0.09 mm thinner than cards of other formats. You can't tell it by eye. But Apple even has smart slots in iPhones - a SIM card cut to fit the format may not fit. Craftsmen from the Internet recommend removing the excess layer with sandpaper. I advise you to make a replacement from your mobile operator. Both Beeline, Megafon and MTS make such replacements at subscriber service centers.
