Both Sprint and Verizon have confirmed that consumers will be able to have the GSM side of their iPhone 4S handsets unlocked. According to a Macworld report, Sprint plans to sell all of its iPhone 4S units with the micro-SIM slot unlocked, while Verizon’s will be locked initially, but can be unlocked if the customers are in good standing for 60 days. The latter has been Verizon’s policy for all world phones, according to the report. The…