Thank you for the article on how to set the country and area code for android phones. However, I have an OPPO R15 Pro and I can't find this function. I have spoken online with OPPO help desk and they say this function is not available on any phone, including Samsung and iPhones. However, the OPPO is the only phone that I have to place the country and area codes ever time I want to make a call to a new number. I find this annoying.
Is there a way to automatically insert the country and area code for OPPOs?