Why did my ex not reply but then call me?

Anonymous
my ex accidentally text me saying he is using a different phone right now and that he got my message.

I didn’t have this new number, so when I asked who it was, he didn’t reply. I went to save it in case it was someone I know, and accidentally called it. It went through though before I quickly hung up.

2 hours later he calls me for 2 seconds. Is he playing games? Apparently the text wasn’t for me, so why did he drop call me back?
Why did my ex not reply but then call me?
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