Complete Guide: Lucky Mobile Number Numerology Here's the response of how to compute lucky mobile number? First, write down your cellphone number on a piece of paper. Add all number digits to a single digit. For instance, if your mobile number is 9051357099, subsequently put in it 9+0+5+1+3+5+7+0+9+9 =48=12=3. Within this procedure, no country code is going to be insert.