Both Sprint and T-Mobile don't require a credit check for their phone services. As of November 2015, Sprint offers customers up to three phone lines without a credit check, while T-Mobile offers up to four phone lines without a credit check.
As of November 2015, Sprint offers its No-Contract $60 Unlimited plan and prepaid plans to new consumer customers without a credit check. Existing customers who want to add a line with no credit check need to open a new account. In addition, the no credit check option is not available to customers who want to participate in Sprint's Easy Pay program. T-Mobile offers unlimited plans to customers without a credit check, but these customers can't subscribe to features such as JUMP! and international roaming.