And/or don't buy your kid a $300 phone with a $100/month plan. Maybe this just shows how 'old' I am at 27, but I didn't have a cellphone as a kid. In fact I didn't have one until I was 19 and was paying for it myself. My parents didn't have them, and they thought I was crazy for paying $35/month for a Sprint plan.<p>But I did accumulate a set of 'hidden fees' when I was younger to my parent's phone bill. I was within the monthly limit for our dialup provider, but we were using a 'local long distance' number to dialup, which we were unaware of. Large phone bill that month ensued and it wasn't a fun conversation then either.