Can't make/receive calls but texts and mobile data works and with full bar of signal

[Jimwel]

1. Model Name: Zenfone 9
2. Firmware Version: Android 13 WW_33.0804.2060.142
3. Rooted or not: Not rooted
4. Frequency of Occurrence: Everytime since it started happening

For some reason, my phone suddenly can't make or receive calls. It worked fine for the last 7 months since I bought my phone (late Oct. 2022) but suddenly had this problem lately which started happening around the previous 2 weeks. The weird thing is that I actually have a full bar of signal and I can send/receive text messages just fine and use my mobile data on one of my sims (I use a dual sim and I use one of the sims exclusively for mobile data. However, I'm assuming mobile data works for the other sim as well). I'm from the Philippines so the service providers I use for my dual sim are Globe Prepaid and GOMO (for mobile data).
I've already tested the sims on another working phone, and calls work perfectly so It can't be the sim, but rather the phone itself. I already tried factory resetting the phone and even tried to make calls while volte+wifi call are on/off, to no avail. 

[dilla-]

🤣🤣🤣 I got the problem only like three days ago and the coverage was bad here anyway so I didn't take it seriously until today. I'm glad it worked.