Big Sky Mobile Account Number, Password & Contact Info

Contact Information for Cellphone Service ProvidersThis is a brief overview of Big Sky Mobile and how to get the information you will need if you wish to port your phone number out to a different company. You can use the information below to get your Big Sky Mobile account number and password.

Big Sky Mobile Contact Info

Customer Service: 1-406-312-1000 | 1-866-705-7012
Hours: Tuesday – Friday: 12:00PM – 7:00PM | Saturday 12:00PM – 5:00PM | Sunday: CLOSED

  • Sales: N/A
  • Dealer Support: N/A
  • Fraud: N/A
  • Insurance: N/A
  • Porting Department: N/A
  • Tech Support: N/A

Carrier(s) used by Big Sky Mobile

  • (CDMA): NO
  • (GSM-A): AT&T
  • (GSM-T): T-Mobile
  • (PCS): NO
  • (Other): Other

Big Sky Mobile Porting Instructions

Account number is required to port out of Big Sky Mobile. The PIN number is a four digit number. A current account holder must call to receive the info. It is not stored on the customer account.


Please contact Best Cellular customer service if you need help or can’t find what you’re looking for in our list of United States mobile virtual network operators and wireless communications service providers.