This no network issue is not dissimilar to what both my wife and I experience at home. Both on Samsung, S25 and S24. We both rely on WiFi calling as the mobile signal is so poor at home. More often than not though we realise that we have missed calls and no text messages are received. The solution is to reboot our phones but this is not a practical solution. We rather thought that using the WiFi option meant that we would have problem free calling however, it appears that as soon as the devices drop the network, so does the ability to make and receive calls via WiFi.
The O2 network is, allegedly, the best coverage for the UK but still, we slip through despite living in an area surrounded by villages, towns and equidistant between Oxford and Swindon.
