How technically did Tinkof know that I had changed my macro SIM card to a micro SIM card?

A

Alex Smith2015-09-01 20:41:35

SIM cards

Alex Smith, 2015-09-01 20:41:35

I changed my macro sim to a micro sim for iphone, after which Tinkof did not let me into Internet banking. How did they know that I changed my SIM card? I didn’t log in through the application, so reading a unique number from a new SIM is out of the question.

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D

Dimonchik, 2015-09-01
@sasnnick

something like this
www.banki.ru/forum/?PAGE_NAME=read&FID=34&TID=210482
the same and Sberbank
has a lot of interesting things here:
habrahabr.ru/company/beeline/blog/133388