This 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 transfer PIN.
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
What network does Big Sky Mobile use?
Big Sky Mobile runs on the AT&T and T-Mobile networks.
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.
Cannot find your carrier? Browse the full list of US carriers and MVNOs.
Check coverage before you port
Big Sky Mobile uses more than one network, so your coverage depends on which one serves your address rather than on the brand on the bill. Check all three: Verizon, T-Mobile, AT&T.
Your right to keep the number is federal, not a carrier policy. The rule is the FCC’s: Portability: Keeping Your Phone Number When Changing Service Providers.
Working a counter? The Big Sky Mobile transfer PIN lookup puts these steps on one screen and texts them to the customer.
Where Big Sky Mobile customers usually go next
Big Sky Mobile uses more than one network (AT&T and T-Mobile). Which one your line runs on depends on the SIM you were issued, so check your IMEI with the new carrier before you switch. Dial *#06# to get it.
T-MobileSame network, no compatibility risk
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Check Big Sky Mobile before you switch
Two free tools. No sign-up, nothing stored on our side.
Other carriers that use more than one network
These carriers also ride more than one network, so coverage depends on your address rather than the brand.
See which network every US carrier uses · Open the transfer PIN lookup