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Tutor

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7 Messages

Tue, Oct 4, 2016 9:52 PM

WIFI calling on Galaxy S5 not working at home

I activated WIFI calling successfully after 6.0.1 update. However, it took me a long time to get WIFI calling actually work at home, after a few resets (network reset, factory reset). Then I got to my work place, I connected to ATT WIFI hotspot and WIFI calling came on immediately. Then when I tried again at home, WIFI calling no longer worked. It still works right away when I connect to ATT WIFI hotspot.

 

What would prevent WIFI calling from working in my home network?

 

FYI:

The way I tested WIFI calling was turn on airplane mode and then turn on WIFI.

 

Also my ISP is Frontier FIOS and it is a 50Mbs service. WIFI signal strength was at max. I will try WIFI calling at some non ATT hotspot to see what happens when I have time.

Responses

Accepted Solution

Official Solution

Brand User
ATTHelp

Community Support

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127.9K Messages

4 years ago

Hi there @PML001!

Here are some great things to check with your ISP! An issue with any of these could be generating the problems you’ve been having!

 

  1. Confirm VoIP Calling is allowed on Wi-Fi Network.
  2. Confirm IPSEC is allowed on Wi-Fi Network.
  3. Confirm Maximum Transmission Unit (MTU) is set to 1500.
  4. Confirm the following ports are open:
    • Port: 500
      • Protocol: UDP
      • Service or Protocol Name: Wi-Fi Calling
    • Port: 4500
      • Protocol: UDP
      • Service or Protocol Name: Wi-Fi Calling
    • Port: 143
      • Protocol: TCP
      • Service or Protocol Name: Internet Message Access Protocol (IMAP)

 

This is the High-Tech method of resolving the issue. Smiley Happy If this does not resolve it, feel free to let us know and we'll contact you directly!

Thanks for reaching out about this! And as always, thanks for being a part of the community!

Bradilynn, AT&T Community Specialist

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*I am an AT&T employee, and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.

Tutor

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7 Messages

4 years ago

Thank you. Opening UDP ports 500 and 4500 is exactly what I need. The firewall rule in my router is set to maximum security and all outbound traffic to any port other than those default well known ports are denied.

 

A question: are UDP ports 500 & 4500 standard WIFI-Calling ports?

Brand User
ATTHelp

Community Support

 • 

127.9K Messages

4 years ago

Hi @PML001!

 

I’m glad to hear those steps worked out for you!

 

Yes, the UDP ports 500 & 4500 are standard Wi-Fi calling ports and work across multiple carriers that offer this service.

 

Thank you for marking this post complete and have a fantastic day!

 

 

Fiona, AT&T Community Specialist

 

 

Still need help? Ask a question! Our 1.4 million members typically respond within 1 hour.

*I am an AT&T employee, and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.

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