有訊號卻無法上網和通話？了解三星手機「假訊號」圖示的意思

If you are using a SAMSUNG phone, you probably encounter this situation : When you are at a low signal place, sometimes you can't use 4G or make a phone call, but you still see the full signal bar! In this video I'll tell you what happened about the "FAKE Signal" issue.

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