maybe my English is so poor.sorry for that.
The device （G510-0010）dual-sim
it is different from Ascend G510(G510-0200)
because the Ascend G510 is single-sim.
If G510-0010 flash the rom which is made for he G510-0200
the net work doesnt work
so the model is for G510-0010
If you want run the rom in your dual device
you can flash the zip for that
After you flash the zip（model-en） ，you can flash all the rom for G510-0020
the net work will be working!!!!
but only the sim1 canbe used