After looking at the bands it supports I realized that it would be no good for T-Mobile in the US.
I admit this was my fault. Still, it's good customer service to allow a customer to return something within a reasonable amount of time.
So, within 24 hours I emailed them:
I would like to cancel this order. My network does not support the wireless bands used by this phone.
On Wed, Jun 11, 2014 at 11:44 PM, OPPOMART <email@example.com> wrote:
GSM：850 / 900 / 1800 / 1900
TD-SCDMA：1800-1920 / 2010-2025
WCDMA*：2100 / 1900 / 850 / 900
TD-LTE：2570-2620 / 1880-1920 / 2300-2400
FDD-LTE*：2100 / 1800 / 2600
My carrier does not use these bands.
I want to cancel my order. It still shows processing. Please cancel my order.
On Jun 16, 2014 12:02 AM, "OPPOMART" <firstname.lastname@example.org> wrote:
Hi,we have shipped your order on 12th June.
The LTE standard covers a range of many different bands, each of which is designated by both a frequency and a band number. In North America, 700, 750, 800, 850, 1900, 1700/2100 (AWS) and 2600 MHz (Rogers Communications, Bell Canada) are used (bands 4, 7, 12, 13, 17, 25, 26, 41); 2500 MHz in South America; 800, 900, 1800, 2600 MHz in Europe(bands 3, 7, 20);1800 and 2600 MHz in Asia (bands 1, 3, 5, 7, 8, 11, 13, 40);and 1800 MHz and 2300 MHz in Australiaand New Zealand (bands 3, 40).As a result, phones from one country may not work in other countries. Users will need a multi-band capable phone for roaming internationally.
More details, please visit: http://en.wikipedia.org/wiki/LTE_(telecommunication)
How do I return it?
Please don't steal from me. I've told you I can't use this phone on my network.