@yde What is the model number of the AC750? Is it TL-WR902AC? Does hotel wifi supports 2.4GHz and 5GHz both or just one of them at once? What is the operation mode of the router? With it connected to...

@Cobra91151 Thanks for your reply, cause the T4U can detect the 5GHz of the Archer C6, the adapter should be working fine; Can 5GHz from Xiaomi Mi9 hotspot be detected by other devices? Meanwhile, I...

@Nasedo Hello, thanks for your reply. You can install the driver for Mac10.14 and test its performance and stability. https://www.tp-link.com/support/download/tl-wn725n/#Driver And you can change the...

@umairhhhs Generally speaking, the official driver for Mac 10.15 will be released in a month after the official 10.15 OS version came out. Right now, Apple released the preview of the Mac 10.15 only....

@Vladek Thanks for your reply; with the 4G sim card put into the 3G modem, the connection can be 3G only due to the limitation of the 3G modem. Even though the TL-MR3420 supports 4G, considering it...

@AlexFr Thanks for your reply. You can give it a go and provide the information mentioned above so that we can do further analysis and try to fix it. Besides, if you have another SIM card, you can...