@vegeta_ssj8 Hi, welcome to our community. I am afraid that still affects tha normal usage, and the good contact between the router and the sim card. It is a pity that we have no better solution...

@Ebasson Hi, thanks for posting question here. After upgrading firmware following suggestions in the thread, you may try to update ISP file again according to the local website. Best regards.

@Ebasson Hi, thanks for posting question here. May I confirm whether the change of internet profile affected the internet access or stability? If your router is EU version, please take local upgrade...

@Jeff8712 Hi, thanks for posting question here. If you choose only IPv6 and it does not work, that means the ISP Vodafone does not support IPv6 service. And you may choose IPv4 as PDP type. Best...

@Gritted Hi, welcome to our community. It is suggested to follow this guide to confirm: How to setup my VoIP function on VoIP Modem Router Thank you and best regards.

@Tp-delinquents Hi, welcome to our community. I am afraid it is impossible. Is it possible to replace your BT hub with Archer VR1800v for a try? Thank you and best regards.