Is anyone else having issues with 4G calling where the 4G signal is low? I only get a bar of 4G in my room although the speeds are in access of 20 Mbps on it. I've had an issue trying to ring out tonight on it however:
I went to make a call and before I even heard the sound indicating that it was ringing, it made the "call ended" tone and that was that. I looked at my screen and the VoLTE icon had gone so it had clearly dropped to 3G. I tried to ring out again but the line was engaged. I waited a few minutes, tried again and the same thing happened. I tried again now it was on 3G again and the same engaged tone./ After waiting a few more minutes, It rung a couple of times before ending the call again. Trying to ring immediately afterwards it gave me the engaged tone.
On the other end of the line- my Grandparents- they heard the phone ring (it did ring there end) and they have caller ID so knew it was me. However, when they answered, there was no one there. This happened three times so they ended up calling on the landline.
I can only assume that my phone (or maybe it's controlled by the network) decided that it was best to switch to 3G as the signal was quite week, except there was an issue with CSFB so it didn't switch across correctly and the call dropped. Sure enough, when I put the phone (a Saumsung Galaxy S7) into 2G/3G mode, the call connected first time without an issue (I tried again after speaking to my Grandma on the landline).
The frustrating thing is, about 10-15 people have been complaining about O2 signal issues in Retford where calls have been dropping or it sounding like the person was underwater. My Mum is on O2 and the rest of us are on EE, so I told her she should have switched to EE. Now I'm getting issues on EE!
VoLTE works fine when I'm in Sheffield but I have a strong signal there so I wonder if it's a weaker signal that is causing the issue?