good day Yas...same here..I just changed my phone number too..my other sim broke..it might be fine..if ever they asked, just explain...have a good day!!..
nope..if ever he changed..he should call USCIS just in case to inform them..btw, for sure he has an email add..somehow they can contact him thru that one..and partly, the change of phone number is just fine than change of address...God bless!!