Here is a diagram to solve MMC Memory Card Problem in Nokia 2700c.Check these parts as red lined in posted diagram.clecn these parts with electronic cleaner and apply hot with hot air or electrical bullbe for a few mints so that these parts can be dry.if not solved then change or replace htese parts and mmc Memory card problem will be solve.Observe diagram and do jumpers like diagram below.
                                                           Nokia 2700c MMC ic 

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