The next time you activate a new line of service or upgrade your handset at AT&T you’ll find a slightly higher fee awaiting you. Last week saw Ma Bell quietly bump its activation fee from $36 to $40. Effective June 8, the change does not impact those who sign one up with an AT&T Next plan. Citing “administrative and other costs”, it’s a few bucks higher than Sprint ($36) and Verizon ($35). As for T-Mobile, well, they don’t charge anything to activate a Simple Choice plan.