Right now the best price with coupon code for 2.1 inch is 189.99 USD (in Banggood). Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Latest coupon code price check (UTC time):
Banggood (189.99 USD)
Banggood warehouse is located in China. Too bad there’s no coupon right now in Banggood. Is it good price? From what I can see this price is higher than average price (186.66 USD).
Link: Banggood product page
Price: 189.99 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGSPRING8OFF
(there’s a little possibility that old coupon will work)
Aliexpress
Click here… to search for Rogbid Model X 2.1 inch 4G LTE 4/128GB Smart Watch on Aliexpress
Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for Rogbid Model X 2.1 inch 4G LTE 4/128GB Smart Watch.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).