Put nextal sim card in i290 phone 'boost' and now says please whait to enter special code

Although boost is a ppd version of nextel, the sims cards are different and are not interchangeable between devices........you can contact SprintNextel and they will give you the "subsidy unlock" code, which is the special code required for your device to stop looking for a specific sim card. If they wont give you the code then you can google "motorola instant unlock" or whatever brand device it is and chose from the large list of web services that can send you the key for just a few dollars. GOOD LUCK AND PLS RATE THIS POST!!!!!!!