i needed a new phone becausemy previoushuawei p20 lite had a broken speaker so i couldn’thear the phone ringing or do anythingwith audio asked a friend if he had something to recommend. since it had to be cheap he recommend a used galaxy note 10 quite happy with it, though i am confused as to why there wasn’t a calculator app pre-installed

you can but you should run fiber instead unless you want lightning to fry a bunch of your stuff