SIM Application Toolkit. SIM Application Toolkit (commonly referred to as STK) is a standard of the GSM system which enables the Subscriber Identity Module (SIM) to initiate actions which can be used for various value-added services.
Cook them immediately if they have been thawed for no more than three days! Once you cook them they will last at least for another four or five days in the fridge! If nothing else put them in a good shrimp marinade for about one half hour - then SMOKE them over mesquite or hickory wood for one hour. These will be eaten up before five days is over! Good Luck & Bon Aperitif!
Fresh shrimp can also be frozen for up to 8 months when stored in airtight, freezer-safe containers or bags. Frozen, pre-cooked shrimp will last up to 12 months in the freezer. If the power goes out, shrimp should be discarded if it the refrigerator temperature exceeds 40 F for more than two hours.