Credit score

So I’m 18 and I got 2 phones in my name with sprint , my bill is $190 a month and I pay it AHEAD of time , like 2 weeks ahead . I pay them in time never missed a payment .. well we had these phones since late July . It’s now October so that’s about almost 3 months . I understand it takes about 6 months to actually get a credit score but if I continue to pay my bill on time what should I expect my score to be ? What was yours when you FIRST got your score ?