My friend on PAYG is getting rightly fed up with me as my phone seems to randomly disallow chat messaging. It will be working fine and then seconds later it's switches to SMS and the option for it disappears from the menu in the default messages app. It sometimes works again shortly afterwards but other times it takes a while and there's nothing i can do about it. I have checked for updates but had no luck. I tried the Google app but it does the same. I don't see how it can be an issue with my connection as I have WiFi and 4g available, this problem also happens at home, work and out around town where i almost always have good service. Can anyone suggest a fix? I have a Galaxy A90 5G.
(In the time it's taken me to write this it had started working again, I have not made any changes to anything and I haven't switched wifi connections etc. It's very irritating and confusing)
