According to users on AT&T's official support forums, Samsung Blackjacks manufactured between November 2006 and February 2007 are the subject of <A HREF="http://www.smartphonethoughts.com/news/show/23641/at-t-and-samsung-quietly-recalling-blackjacks.html">a quiet recall due to an antenna issue.</A> Apparently certain internal components are wearing oddly over time and causing the antenna to loosen and disengage, causing dropped calls and poor signal strength. A service advisory has apparently gone out to warranty centers, so if your Blackjack is acting a little flaky, now's the time to get on the horn.