Good day. I bought a TL-MR100 4G LTE router hoping that I could use it for my existing sim card because the ISP's router's antenna SMA connector was broken so I can't get a good signal now. Tried repairing it but the result becomes worse as a drop of solder was in contact with the mini resistors in the board of the router and when I took off the droplet, the SMD resistors came off together with the solder XD.
Unfortunately, the sim card won't work with the TL-MR100 as I later found out that the sim card is only usable on specific devices with certain IMEIs. The TL-MR100 is already costly and if I bought another router from my ISP, the sim card would be of no use anymore since the router that they sell has already a sim card, and another cost to pay.
My question is, is there any way I could change the IMEI of this router using OpenWrt? I have the IMEI of my ISP's router so I guess I can use this one as a substitute. I really need this for my sister's online class next week and so far I can't get any solutions in the net. I hope you can help me. Thanks in advance.