Possibly "tomorrow"? I don't think it's trademark, since no one can trademark the sentence, "I will talk."

Although I haven't seen it used this way, my guess is that it means "tomorrow." Either that, or "text me," but that doesn't make sense if it's in a text message! The standard symbol for "trademark" is a special character, a raised small pair of letters, TM, like this: McDonald's™. When the standard symbol can't be used, it can be written out but is usually placed in parentheses, McDonalds(tm)

Short for tomorrow. Commonly used when texting

Generally it means Trade Mark. it is used on company logos, names, and slogans

Generally it means Trade Mark. it is used on company logos, names, and slogans