Complex sentence: The Developer Edition is also unlocked for use on GSM networks and the LTE networks of T-Mobile and AT&T; however, it does not support T-Mobile's AWS-based HSPA + network.
Split into simpler sentences: The Developer Edition is also unlocked for use on GSM networks and the LTE networks of T-Mobile and AT&T. It does not support T-Mobile's AWS-based HSPA + network.