How to activate internet in Microsoft lumia 435?

my wild guess it is a cell phone, ?
it is not a relic GATEway PC from 1998 to 2013.

its phone or notepad (unstated model or maker)
Microsoft phone,.
Samsung 504. what is it .
notebook HP 540
Gateway FX540XG from 20 years ago?
Samsung Rant SPH-M540
LG phone -UN540-wine-4
MS
Windows 10 Mobile is being made available to supported smartphones running Windows Phone 8.1. Phones and devices that can upgrade to Windows 10 are Lumia Icon, 1520, 930, 640, 640XL, 730, 735, 830, 532, 535, 540, 635 1GB, 636 1GB, 638 1GB, 430, 435, BLU Win HD w510u, BLU Win HD LTE x150q and MCJ Madosma Q5011.
MICROSOFT LUMIA 540

I suggest you can approach Superunlockcodes.com and specify the country,locked network of Nokia Lumia 435.Based on the availability you can get the permanent unlock service along with free instructions.

Hi Joanne Davies,

If you need an unlock code for your Nokia Lumia 435 to be able to use a different network SIM than the original please go to this link
https://www.mobileunlocked.com/nokia/lumia+435
and follow the instructions.

If you need any help please contact our support team http://support.mobileunlocked.com/hc/en-us/requests/new

******93570098121176778302####### call

you tube or ebay

You can try this link,
http://m.sim-unlock.net/simlock/Microsoft/Lumia_435

Do check the manual settings.Internet connection can be done through Wifi or mobile data.If you are trying through Wifi..switch ON the Wifi in your Nokia Lumia 520 and it will automatically detect the nearby WiFi devices..select the one that you desire and provide the necessary password authentication if required..you will be directly connected to the internet.
If you choose mobile data...try to get a 3G or 4G speed sim since it is faster..and do the respective settings if any, by contacting your network provider.You will be connected to the internet.
You can get the upload and download speeds using
Scanmyspeed.com

Call Microsoft with that error code..