I have been in your store a total of (7) hours in the past couple weeks. Today I was on the phone with (11) different people for four hours and fifty-eight minutes. I would like the mailing address to submit a "Notice of Dispute" to your Arbitration service. I would like to start arbitration. Background: My (11) year old son, broke his current device. (iPhone 6s) I visited a T-Mobile store several weeks back to inquirer as to the what type of used phone was required to switch his service. I was instructed that it should be a GSM device, preferably previously used on the T-Mobile network with a clean IMEI. I purchased this item. I took it to T-Mobile to get it activated, they said everything look correct to activate. When they tried to activate it there were issues. We pulled a sim from an active T-Mobile device and placed it in the used device that I had purchased. The phone worked perfectly on the T-Mobile service. It was discovered that because my used device was not a CDMA device that the Sprint's internal software would not automatically activate the phone. Through additional communications it was discovered that the phone would have to activated by a "level 3 technician". A work order was created to handle this and I was told that within 24-48 hours I would receive a phone call. Phone call never came. I called back today and was told by two separate technicians that they would start a "swap out" process whereby I would turn in the phone that I purchased from a third party and they would give me a replacement phone at the store. It appears that isn't possible. So if I cannot get a swap out on that line, then I would like to start the arbitration process and move my service to another service provider.