First, sT is a default, so no need to state it, just do:
nmap -A -T4 -v 10.0.1.12
Try this: nmap -A -T5 -p- -PN 10.0.1.12
It will scan not only the 1024 ports and some high ports listed in the nmap-services file. You better describe all ports or range:
-p- all 65535 ports (Including port 0)
-p 1-65535 scan ports from 1-65535..You might have a TCP service listening at any high ports.
PN or P0 = no ping (I use PN). Some Firewalls might have blocked the ping, even a router, so avoid it. It is used to discover live machines in a LAN, if not specified, nmap will search the whole lan for LIVE devices.