I cannot find the code for my Cielo hdtv 46" for AT&T Uverse even trying the automatic search. Model num is te46sif.

No, and not even 'Smart', no Internet, no WiFi.

https://www.walmart.com/ip/Cielo-TE24T7H-24-Class-LED-LCD-720p-60Hz-HDTV-2-6-ultra-slim-Assorted-Colors/23709360

and no again. If Walmart stock it, it is a bargain basement brand, made for the cheapest possible price. But a Samsung instead.

https://www.google.com/search?safe=off&rlz=1C1QJDB_enCA643CA644&sxsrf=ALeKk02xEkCIGDTNvM9mHmnt3rCfa06_7g%3A1608226640208&ei=UJfbX9yLDKWe_QaloL2IBA&q=Does+Cielo+TV+have+bluetooth

..

This picture from Google images implies that the power cord is captured inside the case, that you would need to remove that coverplate in the lower left (philips screwdriver) to install or remove the power cord.
https://www.google.com/search?q=Cielo+46+inch+monitor&sxsrf=ACYBGNQQpIsJCQYdMr7wrJt2tzGjOgBShg:1573328939325&tbm=isch&source=iu&ictx=1&fir=hBnndLjhaoKwDM%253A%252C2TT0Hic9AEULUM%252C_&vet=1&usg=AI4_-kQGhtP2OIT2rNWYiGHoFaCg97js6Q&sa=X&ved=2ahUKEwj4_auE893lAhWUpZ4KHSR8Dh8Q9QEwCXoECAkQCQ#imgrc=hBnndLjhaoKwDM:

'course, i don't know if this is your exact model.

Set-up (Programming) procedure is too much to type in here, and is not practical and it will differ brand-to-brand remote controls. If you wish to get more; check the sites linked here. It has set-up code list & set-up procedure to many popular brand remote controls. One among it has general set-up codes to check with TVs and other devices are given, in the order of the 'device's brand name list' in alphabetical order. Pull up older posts. Search the sites by type in the brand name to your device in its search box at the top right part of the display window. It will help you to find the document easily.
http://remotesearch.blogspot.com/
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
http://electrohelponline.blogspot.com/
Search the site by type in the brand name of your device, in the "Search box at the top right of the Home page display" to see the set-up codes to your device, with different brand remote controls.

Set-up (Programming) procedure is too much to type in here, and is not practical and it will differ brand-to-brand remote controls. If you wish to get more; check the sites linked here. It has set-up code list & set-up procedure to many popular brand remote controls. One among it has general set-up codes to check with TVs and other devices are given, in the order of the 'device's brand name list' in alphabetical order. Pull up older posts. Search the sites by type in the brand name to your device in its search box at the top right part of the display window. It will help you to find the relative post easily.
http://remotesearch.blogspot.com/
http://electronicshelponline.blogspot.com/
http://electrohelponline.blogspot.com/

If you wish to get more details; check the sites linked here. It has set-up code list & set-up procedure to many popular brand remote controls. Common codes to check devices with different brand TVs are given, in the order of the device's brand name list in alphabetical order. Pull up older posts. Surf the site with patience.
http://electromedicals.blogspot.com/
http://remotesearch.blogspot.com/
http://electrohelponline.blogspot.com/

Try these codes.
0648 0618

codes for Westinghouse VR4625 is 0000 !

From ATT website: UVERSE remote codes:
http://www.att.com/support_media/images/pdf/uverse/set-up-code-list.pdf

I see for VIZIO codes listed as 1429, 1433, 1439, 1489

Please tell me the remote you are using. Brand, mod # of remote, etc