Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in Hong Kong. As you can see I didn’t find any active coupon for this product right now…
Link: Banggood product page
Price: -3 USD
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): 13f142, BGROTTER383, BGa1b5fc, BG766414, BG91f4e4, BG45225e, 8BGwbg2204
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for Ulefone Armor 11 5G 8/256GB.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).