*#*#4636#*#* not working

Hello,
try this code

• #*#0000#*#* À propos du téléphone
• #*#6130#*#* Test
• #*#2846579#*#* Menu de projet
• #*#121314#*#* Test de fonction

or download the app: https://play.google.com/store/apps/details?id=www.extremedroid.com.a4gltetoolkit

In fact, I want to set my phone to LTE preferred (not only) because my phone connects to 4G only 1 out of 3 times while I'm next to the Free transmitter. I had posted this but received no response: https://forums.commentcamarche.net/forum/affich-35119690-4g-qui-ne-s-active-pas-honor-5c
After some research online, I wanted to try this method.
PS: In my first post, I made a mistake; it’s *#*#4636#*#* and not #*#*4636#*#*

Hello
the Huawei Honor 5C CN 2GB 16GB supports 4G LTE
Here are the 4G LTE bands supported by the Huawei Honor 5C CN 2GB 16GB:

1800 2100 2300 2500 2600
so I don't quite understand why the manipulation

for your information
to activate 4G with Free
you just need to check the box in your MOBILE space and apply
https://mobile.free.fr/moncompte/index.php?page=home + your MOBILE space credentials