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I didn't know phones use mini SD cards? I think you mean micro. And there is probably some damage to either the card, the whole phone or the bit that reads the card. Try another card in the same phone, try the same card in another phone. That way you'll know which has the problem...
-Elliotop
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What else can I help you with?
How do you put your SIM card into your galaxy 551?
Here's a how-to in putting in a SIM to a Samsung Galaxy S4 Mini...
Is sandisk extreme microsdhcmicrosdxc uhs-you compatible with Samsung galaxy s4 mini?
No, the Sandisk Extreme Microsdhcmicrosdx uhs is not compatible with the Samsung Galaxy S4 mini.
What is cheaper a Samsung Galaxy ace or a Samsung Galaxy mini?
galaxy mini
Should the SIM card in a Droid Charge fit in a Galaxy Nexus?
Both devices use the same sized SIM card (mini-SIM).
When was Samsung Galaxy Mini created?
Samsung Galaxy Mini was created in 2011.
Which is best sony ericsson w8 or Samsung Galaxy mini?
samsung galaxy mini
Samsung Galaxy s3 or s4 mini?
The Samsung Galaxy S4 mini is more popular than the S3 mini.
Can you unlock your Samsung Galaxy mini?
i forgot my username (email) and password in my phone galaxy mini?
How do you open android on Samsung Galaxy mini if i forgot the password of the account?
No idea! Buy a new SIM Card might work.
Is galaxy mini good?
no
When is Samsung Galaxy S5 Mini coming out?
As of this writing, the Samsung Galaxy S5 Mini is releasing sometime in the 2nd quarter of 2014.
Is the new samsung gear S2 compatible with the Galaxy S4 mini?
Is the Samsung Gear S smart watch compatible with the Galaxy S4 mini
