Open Question: does a mobile phone contract credit check affects ones credit score?

I have got a good credit, never been declined for credit cards in the past, always pay bills on time, am planning to apply for a personal loan from my bank in a couple of months time from now, so if i go for a mobile contract they gonna run a credit check…i just wanted to know how exactly is it gonna affect my credit score? How many points will get dropped? Is it gonna be a good idea to apply for a mobile contract when i am planning to apply for a loan…or is it okay that one standard credit check will be fine for me? Please Help! Thanks!