signal is there, but can't access the internet

So I have a Samsung S22 Ultra, One day my phone suddenly had difficulty accessing the internet. At First I Thought This Was A Problem With Place I Went To Have Weak Internet Power. But strangely my friend doesn't have a problem like me, even though my friend also uses the same provider as me.

But when I use my phone on the road, sometimes my internet back normal. So in some places my internet can back to normal. But it's weird to see my friend who uses the same internet card as me don't have problems like me. I've tried to change the apn and even change the internet card, but still the internet can't be used even though it has a strong signal bar. So My assumption is that there may be components related to the internet is broken on my phone. Oh yeah, if I use wifi, there's no internet problem at all.

I don't understand exactly where the problem is, what do you think? Maybe you know something or even experience the same thing as me.

Thank you very much.

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