What is happening? SIM card that gives me 100 Mbps on my iPhone but when I plug it in my 4G router it only gives me 20 Mbps????

I have a SIM card that gives me 100 Mbps on my iPhone but when I plug it in my 4G router it only gives me 20 Mbps why is that and how can I fix it??
My router is TP-Link TLMR6400 Wireless N 4G LTE Router 300Mbps

@Yousif7000, welcome to the community!

Maybe:

https://openwrt.org/toh/tp-link/tp-link_tl-mr6400_v1.0#upgrading_lte_module

:grey_question:

Otherwise, I'd confirm the ability of the cell chip to reach that speed.

This internal modem is LTE Cat4 device, so potentially it is slower than modern [Cat6+] smartphone like iPhone just by design . Additionally, operator may restrict usage of a phone SIM in a router.

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Whats all that?? I’m not an IT any help?

A Cat 6 device is theoretically a max of 300 Mbps...your router has a Cat 4 chip with a theoretical max of 150 Mbps...

300 / 100 == 3

150 / 3 == 50

I think you're getting decent speed.

(Refrence: https://www.cnet.com/news/australian-lte-advanced-4g-carrier-aggregation-explained/)

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