If your calls are failing, not connecting, disconnecting suddenly, or you’re experiencing no sound, the issue is usually related to number formatting, internet connectivity, mobile carrier blocks, or country-specific telecom restrictions.
This article explains the most common causes, what you can try immediately, and when to contact Support.
⚠️ Common Reasons for Failed Calls (Quick Overview)
Calls may fail due to:
Incorrect phone number formatting
Premium or high-cost numbers
Temporary recipient unavailability
Internet or network issues
Mobile carrier VoIP blocking
Country-specific telecom restrictions
VPN or proxy usage
Recipient-side issues
Each reason is explained below.
1️⃣ Phone Number Formatting Errors (Most Common)
Talk360 requires phone numbers to be entered in the correct international format.
Make sure you:
Use this format: +CountryCodeSubscriberNumber
Do not use spaces, dashes, or brackets
Remove any leading 0 after the country code
Example (not a real number)
+44 7123456789
Incorrect formatting often results in invalid number errors or calls failing to connect.
2️⃣ Premium or High-Cost Numbers
Talk360 does not support calls to premium or high-cost numbers.
These numbers are blocked automatically
Calls will fail even if you have enough credit
If a call always fails to the same number, check whether it is a premium or special-rate number.
3️⃣ “Temporarily Unavailable” Error
This means the recipient cannot be reached right now.
Common reasons:
Phone is switched off
Poor or no network coverage
Temporary carrier issues on the recipient’s side
What you can do:
Wait 30–60 minutes and try again
Call another number to confirm the issue is not specific to one contact
4️⃣ Internet & Network Issues
Error message: “Invalid Internet Connection”
This error means the app cannot establish a stable internet connection, even if your phone appears online.
Why does this happen?
No active Wi-Fi or mobile data
Weak or unstable connection
Firewall or router blocking VoIP
VPN or proxy interference
Missing app permissions
What you may notice:
Calls fail immediately
Calls ring but disconnect
The connection bars at the top of the call screen show a weak or unstable signal (green means a good internet connection)
What you can try:
Switch between Wi-Fi and mobile data
Restart your device or router
Disable VPN or proxy apps
Check Talk360 permissions (microphone & data access)
Run a speed test (minimum 5 Mbps recommended)
5️⃣ Mobile Carrier Restrictions
Error message: “Initializing”
If you see the message “Initializing” and the call never starts, this usually means your internet service provider or mobile carrier is restricting VoIP calls.
Talk360 is a VoIP service and relies on a stable internet connection. Some carriers block or limit VoIP traffic at the network level to protect their local telecom services. These restrictions are set by the carrier and cannot be bypassed by the app.
Important to know:
The most common country where this happens is the United Kingdom (UK) 🇬🇧, where some carriers protect local calling services
This issue is rarely related to app permission settings
In most cases, it has nothing to do with your phone or app setup
The restriction can happen on Wi-Fi or mobile data
Some users can call on Wi-Fi but not on mobile data (or the other way around)
Even with good internet, calls may fail due to carrier policy decisions, which cannot be bypassed by Talk360.
What this means
You may be restricted from making outgoing calls
Calls may fail even with a good internet connection
The issue can happen on Wi-Fi or mobile data
Some users can call on Wi-Fi but not mobile data (or the other way around)
What you can do:
Test your connections
Switch between Wi-Fi and mobile data
If it works on one but not the other, the blocked network is restricting VoIP
If the call works on one network but not the other, your carrier is likely blocking VoIP.
💡 Unfortunately, carrier restrictions are outside Talk360’s control and cannot be fixed within the app.
Contact your carrier
Ask whether VoIP services are allowed
Carrier-level blocks must be handled by the provider directly
Unfortunately, carrier-level restrictions cannot be fixed within the app and must be addressed by the provider directly.
6️⃣ 🚫Country & Telecom Restrictions (Very Important)
Some countries block or limit VoIP calls due to government regulations, telecom policies, or infrastructure limitations.
These restrictions apply to all VoIP providers, not just Talk360, and are outside our control.
Below, we separate:
Generally restricted countries (mostly the Middle East & similar regions)
Special high-impact countries that require more explanation (China, Iran, India)
Generally Restricted Countries (Government & Telecom Blocking)
In the countries below, VoIP calls may be blocked, throttled, or unstable, depending on the local government or telecom provider.
Talk360 cannot control which routes are blocked, as these decisions are enforced locally.
🇦🇪 United Arab Emirates (UAE)
VoIP calls are heavily restricted
Most VoIP calls fail or never connect
Blocking is enforced to protect local telecom services
Restrictions may change without notice
🇸🇦 Saudi Arabia
VoIP is allowed only on certain networks
Calls may connect but have unstable quality
Some ISPs block VoIP traffic entirely
🇴🇲 Oman
Strict VoIP regulations apply
Calls may be blocked or throttled
Call quality can vary by provider and time of day
🇶🇦 Qatar
VoIP restrictions are enforced
Local-to-local VoIP calls are often blocked
International VoIP calls may work, but can be unstable
🇦🇫 Afghanistan
Nationwide telecom and infrastructure instability
Calls may fail, drop, or have very poor audio
Connectivity depends heavily on the region and the network
🇸🇬 Singapore
VoIP generally works, but Caller ID (CLI) routing restrictions may apply
Some international routes may fail depending on regulations
Important to know for these countries
These blocks are set by governments or telecom providers
Talk360 cannot override or bypass them
VPNs are not supported and may worsen connectivity
Call success may depend on:
Network used
Time of day
Local routing rules
🇨🇳 China — Strictly Controlled & Unpredictable
If you’re experiencing difficulties making or receiving calls to or from China, you’re not alone.
China has very strict telecommunication regulations that significantly impact VoIP services.
Calling to China
✅ Possible, but not guaranteed
❌ Calls may be filtered, blocked, or disconnected
Calls may ring but not connect
Audio may be missing or one-way
Call costs may vary due to routing
Calling from China
❌ Very difficult
Most VoIP traffic is blocked by the Great Firewall
Why is it difficult?
Government restrictions
Internet-based calls are heavily regulated
VoIP traffic is actively monitored and filtered
Blocked or dropped calls
Telecom providers may block VoIP to protect local networks
Calls may be flagged as spam or fraud
Network issues
Internet filtering causes delays, poor audio, or drops
Caller ID & spam detection
Calls without a local Chinese number may be rejected
Repeated short calls (under ~10 seconds) can trigger blocks
Restricted numbers
Government, banking, and emergency numbers do not accept VoIP calls
What you need to know
These rules apply to all VoIP providers
There is no guarantee calls will connect
Success may vary by time of day
VPN use is not supported and often makes calls worse
🇮🇷 Iran — Unstable Networks & Government Restrictions
Calls to Iran can still be unreliable due to ongoing government restrictions and network instability.
If you’re having trouble calling Iran with Talk360, you’re not alone.
While there is no longer an active war, phone and internet services in parts of Iran remain unstable and restricted.
Why calls to Iran may not connect
Government controls on internet traffic, including VoIP
Local infrastructure under strain
Unstable internet access in some regions
Local network blocking without warning
Because these conditions change often, call quality may vary throughout the day.
What this looks like
Calls fail to connect
Calls drop mid-conversation
Poor or missing audio
Calls work sometimes, but not consistently
You may hear someone else, hear background noise, or be connected to the wrong person due to unstable routing and network issues inside Iran
💡 This can happen when local networks reroute calls incorrectly during congestion or restrictions. It is a known issue in regions with unstable or controlled telecom infrastructure.
What we’re doing
We work closely with telecom partners
Call routes are monitored and updated when possible
⚠️ These issues are outside our control, and we cannot guarantee call success.
What you can try
Wait 30–60 minutes and try again
If the issue continues, try again later the same day or the next day (sometimes it can take a couple of days for networks to stabilize)
Make sure the phone number starts with +98
Call at a different time of day, as availability can change
Avoid using VPNs, as they often make connections worse and are not supported
Your credit is safe
Credits remain valid for 12 months
Failed calls do not remove your balance
When service improves, your credit will still be available
🇮🇳 India — Local-to-Local VoIP Calls Are Blocked by Law
We often receive questions from users in India asking why VoIP calls between two Indian phone numbers are not possible. This is not a technical issue and is not specific to Talk360.
The short answer
VoIP calls from an Indian number to another Indian number are blocked by law in India.
Why does this happen?
The Telecom Regulatory Authority of India (TRAI) enforces strict rules that prevent VoIP calls between local Indian numbers.
These rules exist to stop “toll bypass”, which is when internet-based calling services are used to avoid standard local call charges charged by telecom operators.
To enforce this, India requires:
Internet-based calls (VoIP) and traditional mobile calls to stay separate
Calls that start and end inside India are to go through local telecom networks only
Because of this, VoIP calls between Indian numbers are automatically blocked or flagged by telecom providers.
Can Talk360 ask the government to allow this?
We understand this question comes up often.
Unfortunately:
Talk360 cannot request an exception
There is no approval process for individual apps
These rules apply to all VoIP providers, not just Talk360
If a VoIP provider does not follow TRAI’s rules, it can result in:
Heavy fines
Service shutdown
Loss of the ability to operate in India
This is why Talk360 must strictly comply with these regulations.
What does this mean for you?
❌ Indian number → Indian number = Not supported
✅ Indian number → International number = Supported
Similar local-to-local VoIP restrictions also exist in some other countries (for example, Qatar)
What can you do instead?
Make international calls from your Indian number
If you’re abroad:
Register with a local number from your current country
Your Talk360 balance can be transferred to the new number (self-service or via Support)
⚠️ Attempting to bypass these rules is illegal and not supported.
Important to know
Trying to bypass these restrictions is illegal
Using VPNs or call routing tricks will not work and may cause account issues
These limitations are set by law, not by Talk360
7️⃣ Call Connects, but There Is No Sound or the Call Disconnects
If your call connects but you can’t hear the other person, they can’t hear you, or both sides have no sound, the issue is not always the network. In many cases, it’s caused by audio settings, permissions, or the device itself.
Before assuming a network problem, try the steps below.
What this may look like
Call connects, but both sides are silent
You can hear ringing, but no voice after answering
Audio cuts in and out, then the call disconnects
The problem happens with one person only, not all calls
Troubleshooting steps
🎧 Check headset or speaker issues
Disconnect any wired or Bluetooth headset
Use your phone’s built-in microphone and speaker
If using Bluetooth, make sure it’s properly connected or turn it off and retry
🎤 Check microphone volume & permissions
Make sure your microphone is not muted or set too low
Allow microphone access in your phone’s app settings
Test your microphone by recording a voice memo
Close background apps
Close apps that may use audio (voice recorders, assistants, call apps)
Restart your phone to ensure no other app is using the microphone
Check your internet connection
Switch between Wi-Fi and mobile data
Run a speed test (minimum 1 Mbps upload & download)
Restart your router or move closer to it for a stronger signal
Check app settings & updates
Make sure Talk360 is updated to the latest version
Restart the app and try calling again
If the issue continues, reinstall the app
Restart your device
A simple restart can fix temporary audio or software issues
Test calls to multiple recipients
Call a different number
If audio works with others, the issue may be recipient-specific
8️⃣ Recipient-Side Issues (Not Related to Talk360)
In some cases, the call issue is on the recipient’s side, not with Talk360 or your internet connection.
VoIP calls depend on both ends being reachable and available at the same time.
When the issue may be on the recipient’s side
The call may fail, not connect, or disconnect if:
The recipient declined the call
Your number is blocked by the recipient
The recipient’s phone is switched off
The recipient has no signal or very poor coverage
The recipient is in a “dead zone” (areas with no or unstable network at that moment)
The recipient is already in another call
If the recipient is on another call, you may see a pop-up or message indicating that the user is busy or in another call.
Why does this happen
VoIP calls require:
The recipient’s phone needs to be online and reachable
A stable network connection on the recipient’s side
The recipient is to be available to accept the call
Even if your connection is perfect, the call can still fail if:
The recipient’s network drops temporarily
Their carrier experiences issues
Their device cannot accept incoming VoIP calls at that moment
What you can try
Wait a few minutes and call again
Try calling at a different time
Call another number to check if the issue is specific to one recipient
If calls work to other numbers, the issue is very likely recipient-side.
9️⃣ Error Message: “Unable to Proceed at This Time”
If you see the message “Server Error: Unable to proceed at this time”, it means the Talk360 app cannot connect to our servers at that moment.
This is usually caused by a network or internet issue, not by your account or credit.
Why does this error appears
This message can appear when:
There is no internet connection
Your Wi-Fi router is blocking VoIP services
Your internet or mobile network provider is blocking VoIP traffic
How to check and fix it
Test different connections
First, switch to mobile data (3G/4G/5G) and try calling
Then switch back to Wi-Fi and test again
If the error appears on Wi-Fi but not on mobile data, your Wi-Fi network is blocking VoIP
If the error appears on mobile data but not Wi-Fi, your mobile carrier is blocking VoIP
What you can do
Use the connection where the error does not appear
Restart your router or device
Avoid using VPNs or proxy apps
Make sure your internet connection is active and stable
When to contact Support
If the error continues on both Wi-Fi and mobile data, please contact Support via the app.
When reaching out, include:
Whether you were using Wi-Fi or mobile data
The exact error message shown on your screen
This helps us assist you faster.
🔐 Using a VPN App (Important Information)
Some users ask whether they should use a VPN when making calls with Talk360.
Using a VPN is your personal choice. Talk360 does not require, demand, or prevent users from using a VPN.
However, it’s important to understand how VPNs can affect call connectivity and where our responsibility ends.
How VPNs affect Talk360 calls
Talk360 is a VoIP service that relies on direct and stable internet routing.
VPNs change how your internet traffic is routed, which can lead to:
Calls not connecting
Calls disconnecting suddenly
No audio or one-way audio
Incorrect call routing
Error messages such as “Initializing” or “Unable to proceed at this time”
In some cases, VPN apps can also cause:
App crashes
Device performance issues
Increased battery usage
Responsibility and support limitations
While you are free to use a VPN:
Talk360 cannot support or troubleshoot VPN-related issues
We are not responsible for call failures caused by VPN routing, blocking, or instability
Issues caused by VPNs fall outside our control and support scope
Legal considerations (Important)
In some regions, especially parts of the Middle East and Asia, VPN usage may be restricted or illegal.
Any legal implications related to VPN use are the user’s responsibility.
Talk360 assumes no responsibility for legal or regulatory consequences linked to VPN usage.
What we recommend
If you experience call issues, turn off the VPN and try again
Use a direct internet connection (Wi-Fi or mobile data)
Restart the app after disabling the VPN
Common misunderstanding
“Using a VPN will unblock calls”
This is not guaranteed and often has the opposite effect, especially in restricted countries.
💬 Still Need Help?
If your calls still don’t work after following the steps above, our Support team is happy to help.
📱 Contact us via the in-app message
💻 Or via webchat on our website
Please include:
The country you’re calling to and from
Whether you’re using Wi-Fi or mobile data
The exact error message
This helps us assist you faster 😊