I would order a sim kit from Amazon, just to be safe. Otherwise, I would place the cricket order online on 6/17. Verizon should prorate your bill for the few days you're on it following the expiration of your contract.
Opened vials of the following insulins and mixtures are stable for 28 days either at room temperature (defined by manufacturers as 77 to 86 degrees) or in a refrigerator (36 to 46 degrees): insulin glargine (Lantus), insulin glulisine (Apidra), insulin aspart (NovoLog), insulin lispro (Humalog), Novolin-N, Humulin-N, Novolin-R, Humulin-R, and ...
The package insert that comes with your insulin specifies how long it remains good once it is opened, or you can ask your local pharmacist. If the insulin is unopened, it must be kept refrigerated and is good until the expiration date on the vial or pen. The problem with using opened insulin beyond the guidelines listed on the package is that the insulin can lose its potency and not work as well to lower blood glucose levels.