Experiencing SIM card issues is frustrating for phone users. SIM card problems can include the phone not recognizing the SIM card, inability to send messages, make calls, or access the internet.
SIM card problems on phones
In today's life, the need to use phones for communication, information lookup, and entertainment is increasing. To do this, a phone's SIM card is essential. However, for various reasons, SIM card issues are occurring more frequently due to the rapid advancement of phone models and operating system upgrades. SIM card issues disrupt the activities we commonly use on our phones, thus providing a poor user experience.
Common SIM card problems on phones
Fixing SIM Card Issues
SIM card problems on phones can stem from many causes. Each SIM card issue manifests different identifying signs on mobile phones. For example, when there's an issue with the contacts on the SIM card, the names in the phone's contacts won't appear, and you'll receive calls with only numbers displayed. When there's no service, the signal bar on the phone's screen disappears, replaced by "No Service"...
So, there are many SIM card issues on phones. A phone may encounter one SIM card issue or several. The way to fix SIM card issues is to identify the signs of each issue, determine the cause, and fix the problem. Below, Hallo lists some common SIM card issues and how to fix them.
No Service SIM Card Issue
The no service SIM card issue is characterized by the following: the phone still recognizes the SIM card, displays the SIM card on the device, but there's no signal bar. Instead, it shows "No Service" or "No Network." Due to this issue, functions like calling, texting, and accessing 3G/4G networks cease to work.
Causes of No Service SIM Card Issue
Service provider SIM card issue: This issue will occur on all phones using this service provider's SIM card.
Weak signal areas such as tunnels, forests, hills, or tightly enclosed spaces.
Faulty SIM card or dusty SIM tray, improper SIM installation.
Improperly performed iPhone jailbreaking, Android ROM flashing, software or operating system upgrades, etc.
Your iPhone is carrier-locked.
Fixing the No Service SIM Card Issue
Power off and restart the mobile phone to perform a reset, which is the first step most users think of.
Move to an area with stronger signal reception.
Check the SIM card: If it's faulty, replace it; if not, clean the SIM card and tray, ensure the SIM card is inserted correctly.
Purchase a SIM card adapter to unlock the carrier lock on iPhones.
If unable to fix through the above methods, take the phone for repair.
SIM Card Not Recognized Issue
The SIM card not recognized issue is displayed on the phone's screen with messages like "Sim Not Valid" or "SIM not supported." This issue prevents you from making calls, registering 3G, 4G networks, but you can still access the internet if the area has Wi-Fi.
Causes of Phone Not Recognizing SIM Card
Software issues with the phone.
Faulty SIM card or dusty SIM tray, bent SIM tray, incorrect SIM installation.
iPhone locked to a carrier, hence not recognizing the SIM card.
Resolving the SIM Card Not Recognized Issue
Power off and restart the mobile phone to perform a reset.
Check if the SIM card is damaged. If so, replace or renew it.
Check the SIM card slot for improper insertion, clean the slot, and reinsert the SIM card correctly.
Purchase a SIM card adapter to unlock the carrier lock on iPhones.
If the phone's software is old or damaged, hindering network connection, then it's likely due to the SIM card not being registered on the network. You cannot repair it yourself, so take it to the service center for the staff to handle.
SIM Card Unable to Send Messages Issue
The SIM card unable to send messages issue occurs when you compose an SMS message but cannot send it to friends or family, despite having sufficient credit in your mobile account. This issue is less common than others.
Causes of SIM Card Unable to Send Messages
Out of credit for the subscriber.
Weak signal area preventing the message from being sent.
One-way suspension of your subscriber: when your phone's credit expires, the carrier's hotline will suspend it.
For the above reasons, fixing the SIM card unable to send messages issue is relatively straightforward. Check your mobile account balance or move to an area with a stronger signal.
SIM Card Unable to Register on the Network Issue
In areas without Wi-Fi, you need to register for a data SIM to access the internet in Japan. However, some phones encounter issues where the SIM card cannot register on the network, as evidenced by the phone's inability to use 3G or 4G data. Here's how to fix the SIM card not registering on the network issue:
Check the SIM card slot: Incorrectly placed SIM cards not only cause the SIM card to fail to register on the network but also render all SIM card functions unusable.
Check the SIM card pins: Phones that have been in use for a long time or have been dropped are prone to damage to the SIM card pins, requiring a SIM card pin replacement.
Faulty SIM card: Burned, damaged SIM cards, or temporary issues with the network provider.
Remove and reinsert the SIM card and restart the phone: This is a method applicable to all SIM card issues on phones.
Take the phone for repair: If the phone's software is old or damaged, hindering network connection, it's likely due to the SIM card not registering on the network. You cannot repair it yourself, so take it to the service center for the staff to handle.
SIM card issues are difficult to avoid during phone use. However, there are solutions for every SIM card issue. Equipping yourself with knowledge of fixing SIM card issues will help you handle them quickly and save costs whenever incidents occur. Above, Hallo has guided you on fixing some common SIM card issues. If you're interested in referring to the most popular types of data SIM cards, SIM adapters, and phone SIM cards, please visit Hallo.co.
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