good hotspot 3g / 4g

I have this router / hotspot by my operator (Bouygues), and I am so so happy.
The connection when foctionne is stable.
The number of "bars" signal may sound still low, but that is because fleas in your phones and tablets are not as accurate. The Hi6920 chip that is inside is a very high level.
My hotspot has a range of about 9 ~ 10am.
The Bad:
-The Initial connection may take 40 seconds
-We Need a sim card of normal size, you can not use microsim or nanosim adapter
-the hotspot warm during use
-It Is sometimes restart to connect properly
-in some cases should be setup in 4G mode only, it sometimes seems to give priority to the 3g