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)
1. This one's probably the easiest. Say you get a call from a telemarketer and want to block that number. Go into the phone application and choose the Call Log. Tap on the number you want to block.Choose More in the top right corner, and then Add to auto reject list.. That's it. No muss, no fuss.he auto-reject list. The second way to block calls is from the settings of the phone app itself. From anywhere in the phone app â the dial pad, call log, wherever â choose More in the top-right corner, and then Settings.. The second option in the list should be Call rejection.. That's where we're headed. So, tap.