F14 indicates invalid backup counter.
After cleared below counter, problem is solved.
*Method: Just enter 08 setting mode-->key in "388"-->press Start button. Repeat again for "389"
*After cleared the counter, it will also reset the network settings where we need to reconfigure.
C26 problem
Press 08 simmilutery then 388 and enter
OR replace main board OR sram board
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