Hi I need to know the model of Huawei P Smart 2017

Element support. The manual should show if that model number is correct, but it doesn't.

https://www.google.com/search?q=Element+E18115-XM+manual

..

https://www.google.com/search?source=hp&ei=uvR9XraLNcKOlwSMjZfYCA&q=How+do+i+mirror+my+huawei+P30+lite+to+Sinotec+smart+tv%3F&oq=How+do+i+mirror+my+huawei+P30+lite+to+Sinotec+smart+tv%3F&gs_l=psy-ab.3...26959.26959..27976...0.0..0.236.434.0j1j1......0....2j1..gws-wiz.....6..0i362i308i154i357.BDZWkXz6Ws8&ved=0ahUKEwi20KH81rroAhVCx4UKHYzGBYsQ4dUDCAU&uact=5#kpvalbx=_Gf99Xu-KDPTigweH77XwCw34

I don't know much about their differences but the X7 is a lot better in every angle

Sounds like the battery has reached the end of its usable life.

You'll have to check with the manufacturer to see if the battery can be replaced.

are you switching inputs when you plug your devices into your t.v.? most people make this mistake

You can try Setting / Factory reset

or

https://consumer.huawei.com/uk/support/phones/p8-lite-2017/

Huawei AR28 series routers adopt the modular structure, can provide abundant optional Smart Interface Card (SIC) and Multifunctional Interface Module (MIM) modules.
All of the Huawei AR28 series routers based on the Huawei's mature Versatile Routing Platform (VRP). More information about the AR28, or the competitive price, please visit: http://www.huanetwork.com/huawei-router-ar28-series-price_c13
http://www.huanetwork.com/huawei-router-ar28-series-price_c13

G6600 unlock done with infinty..........................



COM6 [VCP0] selected
module v3.62
Action: "sp-unlock"
unlock method: smart fast
Model: Huawei-G6600
Checking data, wait...
Phone should be Switched OFF !
Press and HOLD Power button now !
19200 autodetect
Initializing [6235:8A04:8A01]...
CPU: MT6235
chip: 0000:0000:0003
status: FF
rom: 4D573031
Connecting at 19200, wait...
Release Power button now !
Phone detected, wait...
Hardware: MT6235,E04
Date: 2000.00.00
Version: 1.0
Version: E5.2FY01V01.09
Version: BYD35_09A_PMWY_HW
82 byte(s) read
imei: 35751003xxxxxx
connection Ok
189 byte(s) read
reading data...
building new data...
writing data...
177 byte(s) read
reading data...
reading data #2...
972 byte(s) read
building new data...
writing data...
verifying...
verification Ok
done
Finished, time used: 1 min 58 sec
Remove/Install battery now !