T-Mobile is readying a VOIP phone service that will allow its customers to use standard landline phones over any broadband network for only $10 per month.The system also works with T-Mobile’s HotSpot @Home WiFi cellphones, which lets Wi-Fi-equipped cell phones use a home wireless router for calls.

T-Mobile @Home is available exclusively for T-Mobile customers and will be offered at T-Mobile retail stores nationwide and online; it requires a single-line mobile plan $39.99 or higher, or any FamilyTime mobile plan $49.99 or higher.