I deeply apologize for the TL mistake. Even if it isn't a pivotal event in the story, it still would have created confusion for the next chapter.
My point still stands... jinju is a boomer
Ok, I wasn't gonna say anything because it was a joke, but I have been wondering this for over a week now, and since the subject just came back, I'll just say it... why you say Jinju doesn't understand how her phone works? She is never shown having problems with it.
I don't think Doyeon just said "oh hey, your phone is broken so I'll take it to the repair shop, bye" without showing it to her, right after Jinju had that call from Morae. That would be way too suspicious.
Even if Doyeon took the chip off, an average 40yo person would at least know that the chip is missing (40 is not that old ಠ_ಠ).
Whatever Doyeon did to the phone, it had to be done quiet and fast, since her only opportunities where probably while Jinju was sleeping or showering, so not smashing it either (besides, she needed it working to contact Morae).
I also thought about Doyeon taking off the battery, but without proper tools it's not that easy to open a phone these days and you would feel the weight difference.
Sorry to rant about something so trivial, I'm probably overthinking, but it doesn't make sense in my head. Do they clarify this in the next chapter?