I’ve had some problems with my BlackBerry 8900 from T-Mobile. I contacted their customer service via chat tonight. The lady is so far out there, it’s just so funny. She just copy and pasted right from the manual:

Your equipment should arrive within 7 business days, excluding weekends and holidays. (Inform customer of any estimated delay - see Daily News >Handset Delivery Expectations).

Once we save this order we will not be able to modify the shipping address, shipping method, equipment ordered, and/or cancel the order.
Is your order correct? (If yes, proceed with reading script. If no, correct the order details)
We will send you like-new equipment, which will carry the remaining warranty balance from your current equipment or an additional 90-day warranty, whichever is longer.
Inside the box, we’ve included detailed instructions to help you set up your replacement equipment and return your old equipment to T-Mobile. Please read these instructions carefully!
Please remember to remove your SIM card, original battery and/or other accessories such as a custom cover, memory card or antenna from the defective handset before you send it back to T-Mobile.
To return your old device free of charge, use the Prepaid UPS label provided and take to a UPS drop box or UPS Store location. As a reminder, do not use a mailbox or your local post office to return your old device.

Mobile can not provide credits or compensation for lost devices that are not sent via the prepaid UPS label.

If returning multiple devices do not combine returns into one package. Use the individual prepaid UPS labels, one for each box and return them individually.
The defective device must be received by T-Mobile within 7 days after delivery of the replacement phone. A nonrefundable restocking fee of $xxx (quote the customer the Restocking Fee ) will be charged for not returning the device.

T-Mobile does not accept equipment that is sold by other carriers. You will need to return the T-Mobile branded defective handset that qualified for an exchange, otherwise, you will be charged a Restocking Fee of $XXX.XX (quote the customer the Restocking Fee). Do you have any questions regarding the restocking fee?
After receiving the defective device T-Mobile will screen for damages not covered under equipment warranty. You agree to a nonrefundable $100.00 fee if your phone should have any: Red Liquid Damage Indicators or broken plastics including the LCD. Do you agree to terms and conditions of the exchange?
Read this line for Battery and/or Accessory only orders:
There is no need to return your original battery, charger, back cover, memory card and/or other accessories to T-Mobile when you receive your replacement.

Read all the bolded, she’s crazy… I hope my order actually goes through for my replacement. I hope I don’t get charged $XXX!! That’s alot of money.