In the latest battle of the wireless war, Sprint and T-Mobile are trying to poach each other's customers with tempting bargains.\nT-Mobile turned up the heat this week via its prepaid subsidiary, MetroPCS. Starting Thursday, Sprint customers who switch to MetroPCS will get\u00a0as much as 50 percent off their current Sprint agreements and receive free, low-end smartphones.\nThe two best things about the offer? The price cut, and the fact that MetroPCS service is delivered over T-Mobile's speedy network. However, MetroPCS customers can't take advantage of T-Mobile goodies such as its Binge On feature, which lets\u00a0users stream video from a variety of services without affecting their monthly allotment of data. MetroPCS customer service also can't compete with T-Mobile support, according to\u00a0a survey of thousands of wireless phone subscribers\u00a0from\u00a0Consumer Reports.\nThe dollars and cents of MetroPCS and Sprint offers\nThe offer is only available for a limited amount of time, though the company has not specified when exactly it will end, and the price will not change as long as new subscribers stay with MetroPCS. Customers with two separate lines who opt for MetroPCS service with 2GB of data each will pay $50 a month. Voice and text services are unlimited. Similar service at Sprint costs $100.\nMetroPCS will charge a customer who has only one line and opts for 2GB of data $30 a month, while Sprint charges $55.64.\n T-Mobile \nThe free promotional phones are hardly top of the line: Sprint customers who switch their numbers over to MetroPCS can choose between the LG Leon LTE, the Samsung Galaxy Core Prime, the Kyocera Hydro WAVE or the LG K7. Rebates of $50 are available if customers want more expensive devices.\nMetroPCS, Sprint and the ongoing wireless war\nThe MetroPCS offer is a direct response to another similar Sprint promo; the carrier\u00a0will cut new customers' bills by 50 percent\u00a0when they ditch their current service providers. The MetroPCS press release announcing its latest offer even took a jab at Sprint in its title: "MetroPCS Launches 'The Biggest Offer in Sprint's History.'"\nPrepaid carriers such as MetroPCS aren't right for everyone. However, as I wrote recently, it's wise to remember that the four major providers (AT&T, Sprint, T-Mobile and Verizon Wireless) aren't the only options. In fact, the highest-rated carrier in the previously cited\u00a0Consumer Reports survey was Consumer Cellular, a relatively small outfit that uses both the AT&T and T-Mobile networks.