My iPhone is very intermittent when picking up service from O2. In my office, based in Stonehouse, Gloucestershire, my iPhone is only one with 'No Service' while others here (there are six) are all perfectly fine.
I have to drive 3 miles away to the local sainsburys to pick up a signal (3G, no GPRS).
iPhone 11 Pro 256gb on unlimited data iPad Pro 12.9” 2020 256gb refresh o2 family discount Apple Watch series 4 My first mobile was in 1995 a CM-R111 from sony on Cellnet. Wincanton South Somerset (Full 4g 3G 2g indoor coverage) Remember we are all customers here not customer services