I have TP-Link Archer MR200 v1 router with some costum firmware provided by my Provider. The firmware is very unstable, 4G signal is bad, sometimes it's working sotimes not, sometimes it doesn't want to see the SIM card. Because it is out of warranty I want to install OpenWRT on it using TFTP.
As I understood right, I need to rename this firmware: http://downloads.openwrt.org/releases/19.07.2/targets/ramips/mt7620/openwrt-19.07.2-ramips-mt7620-ArcherMR200-squashfs-sysupgrade.bin to ArcherC2V1_tp_recovery.bin and flash it with TFTP, am I right? I cannot find the "squashfs-factory.bin" version for my device, can I use "squashfs-sysupgrade.bin" ?
In OpenWRT will the 4G module work fine with SIM card?