flash usdt online is the flash USDT software on flashusdtonline.site.
Pick TRC20 or ERC20, paste the address, type the sum, and press flash.
TRC20 addresses start with T. ERC20 addresses start with 0x. Do not mix them.
On flashusdtonline.site, Demo is $19, Pro is $2,500, and Lifetime is $3,000.