for the SE T610 phone…
Disclaimer - USE AT YOUR OWN RISKS AND LEAVE IT ALONE IF YOU DON’T KNOW WHAT YOU ARE DOING.
>*<<*<*
Service Setting->Contrast.
Although this says Contrast, I think it is a Brightness setting rather than a Contrast setting. Beware that brighter settings might use up more batteries.
More stuff for the phone here.
More info here.
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