Following its acquisition of the carrier, T-Mobile said that it will discontinue service on iWireless’ network starting in October. The carrier is working to migrate its iWireless customers to its own T-Mobile core network.

Importantly, T-Mobile said that the iWireless network will no longer work for existing customers after the end of September.

In a statement to FierceWireless, T-Mobile explained that it is not shutting down the iWireless network: “We’re in the process of migrating and upgrading the existing iWireless network to T-Mobile’s core network so iWireless customers can get the same great experience as T-Mobile customers.”

On a website for affected customers, T-Mobile said that “T-Mobile acquired iWireless and is going to convert the network to T-Mobile. Now you’ll be able to enjoy all the great features and benefits of T-Mobile services on the network you already know and love!”  

T-Mobile made it clear, however, that existing iWireless customers would no longer receive service from the network and would have to obtain service from T-Mobile via a new handset or another carrier.