Hi,when a memory card does not detect on phone, it simply because the the memory card you inserted into the phone is not properly fixed or the memory card you inserted into the phone is damaged,that's when if doesn't detect the memory card on the phone.
You can insert the memory card inside a card reader or a friends phone that uses the same memory card type to confirm if the memory card is not damaged yet.
Answers & Comments
Hi,when a memory card does not detect on phone, it simply because the the memory card you inserted into the phone is not properly fixed or the memory card you inserted into the phone is damaged,that's when if doesn't detect the memory card on the phone.
You can insert the memory card inside a card reader or a friends phone that uses the same memory card type to confirm if the memory card is not damaged yet.
I guess that will solve the problem.
Take care.
I've tried it on my own card reader, and it still not working in my phone