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My preferred lock atm. Took this way back with my iPhone 5
lock.jpg
 
I use bold text, but no problem enlarging the time on the lock screen. Do you refer to something else?
It’s a bug but the poster that asked why she can’t elongate the font on the lock screen it may be isolated to a certain iPhone model or the font she picked for it

but she knew it was causing the issue with it on
 
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