Where do the commas belong in these sentences?

I get asked by my friend why I don't have an iphone well this is why. My future goal is to try & keep mobile for longer than two and half months for once without either breaking or loosing it.

WHERE DO All THE COMMAS BELONG IN THE ABOVE SENTENCE? Please RE-WRITE THE SENTENCE AGIAN WITH THE COMMAS IN IT thanks heaps for your help

I get asked by my friend why I don't have an iphone, well, this is why. My future goal is to try & keep my mobile for longer than two and half months for once, without either breaking, or loosing it.

commas just go where a pause in speech occurs, if you read back a sentence out loud, you will see where commas are supposed to go.

Btween friend and why.full stop after iphone and before well.between once and without.

I get asked by my friend why I don't have an iphone, well this is why. My future goal is to try & keep mobile for longer than two and half months, for once, without either breaking or loosing it.

I get asked by my friend why I don't have an iphone. Well, this is why. My future goal is to try & keep mobile for longer than two and half months for once, without either breaking or losing it.

This can't be sorted out just with commas. Please note it is "losing" here, not "loosing".

"I get asked by my friend why I don't have an iPhone. Well, this is why. My goal is for once to try and keep a mobile for longer than two and half months without either breaking or losing it."

"future" is tautologous here, meaning it's superfluous. It goes without saying that a goal is in the future.
It runs better if "for once" is moved to a previous place in the word order.
"loose" is when your clothes are too big for you. To "lose" is when you misplace something.