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Aside from issues like not recognizing the SIM on Android, iPhone, which we've discussed and provided solutions for, the problem of Viettel SIM having signal but unable to make calls frequently occurs nowadays. Mytour.vn has received many inquiries related to this matter.
Fixing the glitch of Viettel SIM having signal but unable to make calls
Before delving into remedies for this issue, let's first understand the underlying causes leading to this situation.
1. Causes of Viettel SIM call failure
- Your Viettel SIM hasn't been activated for use.
- Your Viettel SIM account is out of credit or in negative balance.
- Your subscriber account has been unilaterally blocked from making calls for some reason.
- Your phone has outgoing call restrictions set up.
2. Fixing the glitch of Viettel SIM having signal but unable to make calls
* Case 1 :
In the scenario where your SIM is newly purchased and hasn't been activated, attempting to contact someone is futile. Here's the remedy:
You need to call the hotline number: 900 (free of charge).
Then, follow the steps instructed by the hotline to activate your subscription, such as:
+ Subscribers need to register personal information on the system, including: Customer name, date of birth, ID card number, date of issue, and place of issue.
+ The hotline operator will notify successful activation once this process is completed.
* Case 2 :
In the event that your Viettel subscriber account runs out of credit, you'll need to perform the following check:
- Access the dialer and enter *101# and press Call . Immediately, we'll receive account information as shown below.
If your account runs out of credit, proceed to recharge using prepaid cards or postpaid mobile billing to continue making calls and fix the issue of Viettel SIM having signal but unable to make calls.
Check out more about cheap mobile top-up methods.
* Case 3 :
If your Viettel subscriber account is unilaterally blocked by the hotline, you won't be able to make outgoing calls anymore. Here's how to fix it:
- Contact Viettel hotline number: 1900 8098 .
- Then, provide information about your SIM subscription, and the hotline operator will assist you in removing the unilateral block and fixing the issue of Viettel SIM having signal but unable to make calls.
* Case 4 :
This is a common occurrence with current Android devices, where accidental call blocking renders us unable to communicate. Here's how to fix it:
Step 1 : Access the Phone app from the phone's home screen. Here, tap the 3-dot icon as shown below and select Settings .
Step 2 : Next, to fix the issue of Viettel SIM having signal but unable to make calls due to blocked outgoing calls, we'll navigate and select More settings and choose Call blocking .
For some other Android devices, you'll select the Call blocking setting.
Step 3 : Finally, you'll choose Outgoing calls , and turn off all call blocking features as shown below to fix the issue of Viettel SIM having signal but unable to make calls on an Android phone.
So, we've just explored the reasons behind the issue of Viettel SIM having signal but unable to make calls, which many people wonder about, and how to fix this problem on your phone to make calls and communicate with friends and family when needed.
https://Mytour.vn/sua-loi-sim-viettel-co-song-nhung-khong-goi-duoc-23621n.aspx
In addition, for those who are Viettel subscribers with 11-digit numbers, you'll need to pay attention to the issue of changing 11-digit phone numbers to 10 digits which is about to take place, so you can grasp the new prefixes and how to change numbers according to necessary information.
