I forgot my nokia asha 210 security code.. my cell IMEI 1 :355514052661981 IMEI 2 :355514052661999

i have inserted my 4GB macro SD memory card in a memory reader and through the reader i took some audio files from a computer. when i finish that, i inserted the memory card back to my phone, which its model is Nokia Asha 210 Dual Sim, but the problem is that when i try to open the memory card it asked me to enter a memory card password. i have never given a password for it and it has never asked me such a question before. what do you think happened to my phone? what would probably happen to my phone? now my memory card is not working unless i enter the password. but i dont know the password. how can i unlock the memory password? please help me people. i have inserted my 4GB macro SD memory card in a memory reader and through the reader i took some audio files from a computer. when i finish that, i inserted the memory card back to my phone, which its model is Nokia Asha 210 Dual Sim, but the problem is that when i try to open the memory card it asked me to enter a memory card password. i have never given a password for it and it has never asked me such a question before. what do you think happened to my phone? what would probably happen to my phone? now my memory card is not working unless i enter the password. but i dont know the password. how can i unlock the memory password? please help me people.

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