hi christa,
1/ in the MS : hard to compute. thanks to UL power control, the MS will always use as less power as it can. Less than this, the call will drop.
2/ I think the coverage is increased by about 5%, or perhaps even 10%. It would be better to do a coverage prediction in a planning tool, and assess the impact this way.. I could try, tomorrow (if i think about it)
regards
pix