I buy one resdmi 1s to one of my colleague (sigh) because I have a redmi first version with which I am comfortable. I installed miui 36 versions in Ita and the multilingual one, but in both version have the same problem with the dual sim. My colleague uses two sim: one for browsing and one for phone. If I insert the two sim, however, the navigation is be very bad even with perfect reception. In practice it seems that works but then after a few seconds it stops, then works again, etc. .. If I disable or remove the sim to 'call' the navigation works perfectly. I tried to insert 'only 3g' in the settings without any benefits. What to do?