Interesting acquisition announced today....Blackberry to acquire Good Technologies. For those of you who don't know or are familiar with Good, it's basically a BYOD platform for enterprises. (Email, intranet, etc.) Not necessarily directly Sprint related, but many people use both.
I've seen some threads recently about the differences between SIM/UICCs and though posting a compatibility matrix would help people.
This is pretty straightforward. The matrix has every Sprint LTE device, and what UICC card is meant for that device. Mix and matching UICC card types probably will not work, but swapping around UICC cards for devices that use the same type of card should work properly.
Keep in mind, you cannot simply move your UICC card to another phone to use it. Sprint's device authentication system still requires the correct UICC and MEID to be on the account to authenticate properly and work.
Yep, no real reason to add new towers in most areas. TMo's network is spaced for AWS at this point in urban/suburban areas so they have their pick of where to put 600 panels. Merely swapping 700 for 600 on the sites that have 700 would be an immense improvement.
Likewise, if M-MIMO n41 is as good as folks say it is, AWS LTE spacing should be sufficient for that as well. Particularly since TMo can pick L-Sprint sites if those are better. Depending on area, those sites are spaced for either PCS or B41.