iPhone X [Help] Router not letting Wi-Fi Calling through

Discussion in 'iPhone' started by DeanLubaki, Apr 15, 2018.

  1. DeanLubaki, Apr 15, 2018
    Last edited: Apr 15, 2018

    DeanLubaki macrumors 6502


    May 29, 2014
    Toronto | Montréal | Québec
    I have an ASUS RT-AC3100 router on ASUSwrt Merlin, and something seems to be preventing my iPhone from using Wi-Fi Calling.
    When on any other network, it works fine, but on my network, the "Wi-Fi Calling" carrier signal shows up only for a second, as if the VPN tunnel is terminated.
    I know for sure my network is the problem because I have a personal and a work iPhone on different carriers and the exact same issue is happening.
    My ISP is Bell Fibre (Toronto), and it is connecting using PPPoE.
    Things I have tried:
    - Disabling Firewall on router (so all ports including 500 and 4500 are open)
    - Enabling VPN passthrough on router (including IPSec)
    - Changing DNS on router
    - Enabling IGMP snooping
  2. KGB7 Suspended


    Jun 15, 2017
    Rockville, MD
    Talk to Merlin about it, there might be a bug in his firmware.
    Also try Asus OEM firmware as well.
  3. jetsam macrumors 6502

    Jul 28, 2015
    You might try posting to the Asuswrt-Merlin forum on small net builders:

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