Interception of data on a SIM card (given different numbers in a megaphone)?

Question

Information Security

I bought a "beautiful number" in a megaphone, went to the salon for a SIM card, the manager left for a very long time with my passport and my mobile (there was my order number in the SMS) spent time in another room and with me the same amount (only about 35-40 minutes). As a result, he gave me a SIM card, another number was engraved on it, which he crossed out in front of me and wrote with a marker, the one that I ordered.
At home, I inserted a sim and in the properties of the android I found a number in the column - that engraved (crossed out). I called and they said the caller is unavailable. I called the one that ordered - all the rules. That is, in the SIM card, as it were, info about two numbers chtoli ...
Question: Could it be that all my data goes through that "engraved" number that the manager has access to? ) (2 facts suggest uncleanliness - for a long time the design - apparently the dude did several operations, and the wrong number in the android settings)

Answer 1

The manager took the first SIM card that came across and re-registered its IMSI to the number you chose through their service service.
Megaphone workers will not send the same sets of beautiful SIM cards to all offices.