1st - you are past the time to exchange the phone through the carrier, without paying for a new device.
2nd - if you lose your phone and have insurance, you will get the same device as a replacement + an insurance deductible charged to your account. You cannot ask for a different handset like you are suggesting.
On April 4th I bought a Samsung SIII from T-mobile. I paid 310$ then every month 12.50$ for 24 months. Now I don't like the SIII for personal reasons I want to get iPhone 5. Is that possible? It's been 1 month and 18 days I bought the phone. Can I upgrade my phone to Ip5? And Do I have to pay? How much? Any alternative suggestion's, welcome!
2nd question- What if I lost my phone as I am paying for Insurance. Can I have new phone? And Can I chose Iphone 5 instead of SIII?How much I have to pay for that!