The iPhone 4S is new to Sprint.

As such, perhaps growing pains aren’t to be unexpected.

Per CNET, a small but growing number of Sprint customers are complaining of slow data speeds. So slow that Siri and other network-sensitive features won’t work.

These complaints started the same day the iPhone 4S was released and continue until today. A thread at Sprint’s community forums that chronicles the problem has almost 248,000 views and over 1,300 replies and is one of the top forum posts on Sprint’s public message board.

Sprint’s head of product development, Fared Adib stated that the carrier is aware of the complaints, but has not been able to reproduce the slowed data connections some users are reporting. Sprint is reportedly working with Apple to track down the problem, if there is one, and find out whether it is hardware or software-related. Once they have identified a root cause, the two companies can work on a fix. When an update is available, Adib said Sprint will get it out quickly to users who are affected by this problem.

Stay tuned for additional details as they become available and if you’ve seen the shortcoming on your end, please let us know.