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Repair and disassembly information for Samsung's flagship S20+ Android smartphone, released in March of 2020.

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Why is my phone ussd code have problem when dialed

When I type ussd code on the dialer it does not popup and it's keep saying "connection problem or invalid mmi code. Please I want solution to solve it.

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Hi @hopkinsdeeper

Check your service providers website to see if they still support ussd codes.

Where I am (Australia) all the major carriers have phased it out

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