BPI-RV2 sim missing

When I use any 4g modem in PCIE slot I always get “Sim card missing” error. Any modem. I’ve tested: Quectel EP06, Telit LM960, Telit LM960A18 (both of them switched to USB2.0 only mode). When I use an m.2/pcie adapter with own sim-slot - it works good. But any 4g device in native PCIE slot doesnt get internal sim-slot working. I’ve tryed the latest BPI sources for RV2 openwrt, and vanilla openwrt snapshot. No success. The screenshots are unnecessary I suppose. Maybe there is a way to make this thing working? Mby solder smth with smth? Help plz.