We reported yesterday on the iPhone 4S supply issues that have been plaguing US operators since the device launched last month. The three major iPhone carrier partners are having trouble keeping up with consumer demand.

Most retailers are sold out of the phone in-store and are reporting shipping dates at least two weeks out. For those of you still trying to get your hands on this year’s hottest handset, you may want to try your local RadioShack this weekend…

9to5Mac has obtained internal documents from the national electronics retailer claiming it’s slated to receive iPhone 4S shipments this weekend. Don’t get too excited though, the smartphones are Sprint-flavored, and only of the 16GB variety.

But if you are desperate to snag Apple’s latest smartphone, it’s certainly worth checking out your local RadioShack. According to 9to5Mac, some locations already have some stock available, and others should be receiving theirs over the next couple of days.