My new iPhone 6 Plus arrived via UPS yesterday. I followed T-Mobile's instructions to return my 5S (I bought the Jump package allowing me to trade it in), putting it in the bubble bag supplied and attaching the prepaid Merchandise Return Label (actually a USPS label). I took it to the post office, intending to buy some insurance - "You may purchase optional insurance from the Postal Service at your expense."

Surprise! Two postal clerks told me that one can't buy anything with this type of label. You can't insure it, you can't certify it, you can't do nuttin'.

I'd now be doubly furious I mailed it and it disappeared, so I bought an envelope, wrote the address on it along with "Apple Return" in two places, and packed the original bubble-bag inside. I got back in line, bought the insurance and postage and mailed it off.

Because I have the time, I called T-Mobile afterwards to let them know and they credited my account for the extra five bucks I spent on postage and envelope.

So far I like the phone.