I bought a Cellcom SIM Card with 50 NIS Credit for 120 NIS just a few steps south of Momos.
I can be reached now from all over the world under
+972 (0) 526 59 60 40
As i wanted to place a long distance call today, i figured that i could not and have to activate this service (with my PIN 2) by dialling *778 and following the instructions. Unfortunately the voice menu is in hebrew and and do not understand enough to safely unlock this feature, so i will need assistance, which should not be a problem as i find Israelis to be very helpful and friendly.