Who I have the same questioned this topic

I have had the XS Max about 3 months and about a month ago it started dropping calls.  No trend to when it dropps calls.  Have made many a phone call to Verizon for this issue and they finally sent a replacement XS Max and in less than 5 days it dropped 5 calls in a row and then the next day 2 calls in a row.  I have since gone back to my 8 plus to see if it drops calls (which it never did).

would like to know if anyone else experience this problem with the XS Max.