Main article: Multi-user MIMO. Recently, results of research on multi-user MIMO technology have been emerging. While full multi-user MIMO (or network MIMO) can have a higher potential, practically, the research on (partial) multi-user MIMO (or multi-user and multi-antenna MIMO) technology is more active.
There are two ways to decline a call on the iPhone. 1  By pressing the Sleep/Wake button. 2  By tapping the 'Decline' button onscreen (appears only when the phone is unlocked, as you've mentioned)
Error message when calling out on IPhone 4S. When we dial out using our Iphone 4S phones, we get a message that says Please re-enter the 10 digit number you are calling. Do not press send, *67 or *82 cannot be used to block Caller ID. This is happening with all 4 of our Iphone 4S's. I have the Iphone 5S on the same plan and it is not doing this.