You know the fine print of your EVO 4G contract that gives Sprint the right to limit throughput speeds without notice? Skipped past that part? Well, consider this your unofficial notice. If what we're reading above is accurate, then Sprint appears ready to introduce data throttling this summer. Where and how are the big questions. The image above received from a tipster appears to have been grabbed from Sprint's own "The Playbook," though we have no way of confirming that at this time. It certainly make sense though given T-Mobile USA's recent move away from overage charges in favor of throttling.