I bought pot from this sketchy foreign guy who gave me his phone number. He asked for mine and i typed it on his phone without thinking about it. He said he would message me on WhatsApp. Afterwords he showed me a picture of what I believe was a prostitute he was trying to pimp out. Needless to say that sketched me out so I deleted my WhatsApp account. Is there any way he could do something nefarious with just my phone number? Mostly worried about location tracking. Any replies are greatly appreciated!!