Poor signal with iPhone 12 Pro Max
I have just received a new iPhone 12
Pro Max . On my 11 Pro Max and my Wife’s XS the signal in the house is 2 bar and ok but not great. My new 12 pro max signal is terrible. Instead of the previous 2 bars I get 1 bar and calls drop constantly. Online I see others have the same issue. I spoke to Apple and they were dismissive of comments on the forum and said I could maybe return for a replacement but would have to be without a phone for a time. Very disappointing for the service they are supposed to offer. I am a key worker on call and therefore cannot be without a phone. Given other comments on here, despite Apple dismissing it, I assume it is a general hardware or software issue and not specific to me. Have others got the same issue and how do I progress?
iPhone 12 Pro Max, iOS 14