Salut Tzorin81,
Bienvenue dans la communauté!
Je vais continuer en anglais puisqu'il s'agit du forum anglais...
Where did you find the phone? Could there be more than one version of that phone? As far as I can tell, these are the band/frequency specifications:
| 2G bands | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G bands | HSDPA 850 / 900 / 1900 / 2100 |
| 4G bands | LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800), 38(2600), 40(2300), 41(2500) |
~taken from here.
Judging by those specifications, that phone has all of the compatible bands/frequencies for 2G and '3G'. With regards to LTE, that phone only has one compatible band/frequency, band 7 or 2600MHz. You can verify the compatible bands/frequencies here. While the phone should work on the LTE networks, coverage depends on corresponding bands/frequencies available at your surrounding cellular towers. Not all bands/frequencies are used at all cellular towers. You can get an idea of your surrounding cellular towers here.
**edit** It's possible there are different versions of that phone with differing specifications**
In addition, it should be noted that the different bands/frequencies have varying characteristics. For example, the higher frequencies generally have a greater potential bandwidth than the lower frequencies (see table here). On the other hand, the higher frequencies tend to decay faster. That is, they do not travel as far, nor penetrate as well as the lower frequencies (see graphic here).
So that phone should work on the LTE network. However, I personally wouldn't chose a phone with a limited band/frequency compatibility.
Hope this helps 
Cheers
