img file will work on D2206 and D2243 (because they are indeed LTE devices with Qualcomm MSM8926-2 quad core and I suppose they share some common things) Also, the brazilian guy says root works with his D2243!
Of course, the firmware version for root and to avoid the phone be not USBable should be 18.4.C.2.12 (latest firmware available) and not the firmware ended in 1.36
Edit by lexiyuri: you can proceed using D2203 img in D2206 and D2243 devices without fearings, and its not neccesary create a D2206 img file