I wanna switch my phone with a family member, and keep our original numbers, but the sim I use in my current phone (one plus one) will not fit in iPhone and vice versa. Will we have to buy two new sims for our phones to work with the number we want?
If you have the regular-sized SIM card and need a smaller one (micro or nano), you need to cut the SIM card. You can print a SIM card cutting guide. Download it from this link >> click here