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+1(XXX)555-XXXX The 555 prefix for US phone numbers is reserved for fake phone numbers in the US and elsewhere. Use this block for testing.

Which would be excellent advice if he was using phone numbers.

Which the phone's IMEI isn't.

> Remember I told you the phones were "randomly" generated? The python script would randomly generate an 11 letter "phone number".

Author says "phone number" and 11 letter(?) IMEI is 15 digits, so who even knows what the author means at this point.