I lost my phone when I was at the place last time.

  1. I lost my phone when I was at the place last time. I thought about the incident all of a sudden. I do now know why.
  2. I lost my phone when I was at the place last time. That incident just occur to me.
  3. I lost my phone when I was at the place last time. That incident just spring to my mind.
  4. I lost my phone when I was at the place last time. I suddenly thought about the incident.

Are the above sentences correct? Please advise.

  1. typo - you’ve sent ‘now’ instead of ‘not’.
  2. occurred
  3. sprang

All the sentences are a little rambling. The natural statement would be shorter:

Thanks for replying.

How should I rephrased the sentences in simplest way.
Hope to hear from you.

I suddenly thought about last time I was at that place when I lost my phone.