Note that to get command line on iPhone, you need to jailbreak it first.
To call: install sbutils from Cydia and type this on command line:
To SMS: install biteSMS from Cydia and type this:
/Applications/biteSMS.app/biteSMS -send -carrier +79123456789 'hello'
Note that I tried some other application, but it don't work with Cyrillic (and probably other non-ASCII) letters
am start -a android.intent.action.CALL -d tel:+79123456789
To SMS: install shellMS from F-Droid and follow its instructions, like this:
am startservice -n com.android.shellms/.sendSMS -e contact +79123456789 -e msg 'hello'
Note that I tried using some native intent, but it didn't even fill in the message.
To turn screen on or off, emulate pressing "power" button:
input keyevent 26
To check if screen is on or off (note that you need Unix tools for this):
dumpsys power | grep blanked | sed 's/.*=//'