Attachment address: https://xzddf.com/en/article/27
Solution#
The blogger is using a GiffGaff UK SIM card, which was converted to an eSIM a few months ago. During this time, most of the time, SMS could not be received, but sending SMS was not affected. I checked various solutions online, but none were effective.
Finally, in the settings of the Pixel phone, I turned off the automatic network selection feature for the GiffGaff SIM and manually switched to the Unicom 4G network, after which SMS could be received instantly. The root of the problem was that when the automatic network selection was enabled, the Pixel automatically selected the Unicom 3G network for GiffGaff, resulting in SMS reception failure.