I really love this brand, I have been using it since 2019. You guys should please do an unboxing review on the N9195. You guys didn't do any review on that and it's a new product with a new kind of display.
Hello. In the normal mode, first long press the button C, when you see the "second" flashing, it means you have entered the setting state; then press the button for 5 times, and you can see the "year" flashing, and then press the button A to adjust the number. Thank you.
Hello. The price of this watch is about 25USD. You can check out in this link to see more info: www.aliexpress.com/item/4000256028397.html?spm=a2g0o.detail.1000023.1.243b63e7nzZa83
Hello. The price for NF9170 in Bangladesh is 2237BDT. And you can check out in this link: www.aliexpress.com/item/4001115696144.html?spm=a2g0o.store_pc_allProduct.8148356.1.61ca4db7D8J8u4
Are you mean the button B at lower left side? We offer one year warranty period and you can ask the aftersales for help from the platform where you bought this watch.