Check coupons or create price alert down below. You probably want to know what is the best price?
CPU: A53 Dual Core, 1150mAh, 3G WCDMA 1/5/8, RAM: 1GB, Network type: GSM/WCDMA/TDD-LTE/FDD-LTE, Card Extend: up to 32GB, OS: Mocor5, 4G TDD-LTE 1/3/5/7/8, Type: Bar Phone, Frequency: , ROM: 8GB, Screen size: 2.4 inch, 2G GSM 3/8, Brand: QIN F21S, Platform: SC9820E, Screen resolution: 240×320, 4G FDD-LTE 38/39/40/41
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. You can get coupon down below.
Link: Banggood product page
1. ($75.80): BG55d4b2
apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGb9d2f9, BG3e1dd8, 13f142, BG6ce295, 6GSGIT
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Check out price history chart (for all/most countries) for QIN F21S 4G 2.4 Inch 1150mAh 1/8GB Phone.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).