No connection using eSIM on Dual Sim iPhone

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1

Im on iPhone 12 Pro max, iOs 15.4 using Eufy latest 4.1.4

I have dual sim
BT for Phone calls (standard SIM)
EE for Data (eSIM)

Using Doorbell (Battery) 2k

Works fine when I switch to BT conventional sim (albeit it always takes ages to connect when someone calls at the door and generally theyhave left by the time I can get a two way link)

If I use the eSIm which is 5G and works flawlessly with EVERY app on my phone for data only, the video feed never works and often I see a header bar “No internet connection”

I have tried to disable VOLTE as some others have suggested but the iPhone 12 doesnt allow Data Options as other models do so you cant disable VOLTE

I have spoken in depth to EE and Apple who both point the issue with EUFY yet the response I have had from EUFY is as follows

"We have tested the situation where eufy app runs on the Phone with two sims and it works well.

…the root cause may be the sim card or the operation of the dual sims. In your case, it is recommended to disable VoLTE on one SIM and for iPhone 12 and beyond, please help to contact the sim operator to see how to disable VoLTE."

No help whatsoever and negating any responsibility with this clear issue

I wish I knew this before I bought the doorbell as it’s completely useless unless I am in the house on WiFi

Hopefully at some point they may fix this but I’m not holding out much hope!

Any suggestions other than what I have already tried?

2

Try this! Ok, so I thought no I have a possible workaround for this frustrating issue. I have downloaded Spedify which is a VPN app which allows you to use both WiFi and mobile data simultaneously, I’m not sure why this works, but I think it tricks the app into thinking that it’s using WiFi. I’ve tried running the app even without connecting to a WiFi networks and it finally works! Just to note, this is a work around and Eufy REALLY need to resolve this issue and hope this highlights and proves that their app developers need to sort this out! This issue mainly affect dual SIM devices, so let me know if this has worked for you guys.