T-Mobile offers a $100 or $50 refill card for free with the purchase of select prepaid phones. (Although no models show a $100 refill card on the search page, you'll see it in-cart with select models.) Plus, all phones receive free shipping. That puts several as the best refill bundles we've seen from T-Mobile in recent months. Sales tax is added where applicable.

A best bet is the Samsung Galaxy Exhibit 4G Prepaid Android Smartphone for T-Mobile (pictured) with a $100 T-Mobile Refill Card for $199.99 with free shipping. That beats our mention from two weeks ago (which was $20 cheaper, but only included a $50 refill card) and the best such bundle we've seen for this phone. It features a 3.7" touchscreen, 1GHz processor, WiFi, Bluetooth, microSD card slot, and Android 2.3 OS (Gingerbread).