The details have been outlined throughout the week, but AT&T has put together a one-stop shopping guide for those planning to score an iPhone 3GS tomorrow.

Here are some of the highlights:

Availability:
• The iPhone 3GS will be available at all 2,200+ AT&T locations as well as the 211 Apple Stores nationwide.


Pre-Orders:

•Early hours for pre-order customers start tomorrow at 7 am. Make sure to check your receipt for the actual arrival date—if you were late to the party, you may not be able to score your phone right away. This goes for shipping pre-orders as well. If you ordered early enough, devices will begin shipping to your home or office tomorrow.

Pricing:

•199 (16GB) and $299 (32GB) for all new AT&T customers and existing AT&T customers who have fulfilled their previous agreement. In addition, AT&T yesterday extended this pricing to iPhone 3G customers who will be eligible for a full upgrade in July, August, or September 2009.
•$399 (16GB) and $499 (32GB) for existing AT&T customers who have not yet fulfilled their existing agreement but would like an early upgrade to iPhone 3G S. This early upgrade option is exclusively available for iPhone 3G and iPhone 3G S.

Prices above require a two-year service commitment and approved voice and data plan. Options are available to purchase these phones without a two-year contract commitment.

What To Bring:

New AT&T customers who wish to port or retain their phone number from another wireless carrier should consider bringing a copy of a bill from their current service provider. Customers will be asked to provide account information as it appears on record with their current provider, including:

•Account number
•Name of the account holder
•Account holder's Social Security Number or Tax ID
•Billing address
•PIN or password (if applicable)

Customers should listen to voice mail messages on their current devices and write down any necessary information before purchasing iPhone 3G S, because existing voice mail messages will be lost switching devices.

Purchase Requirements:

Initially, AT&T stores will sell one iPhone 3G S per person for new customers; existing customers may purchase one per eligible telephone number. Online shoppers may purchase one device per household.

Customers who inherit an iPhone 3G from a friend or family member will need to visit an AT&T store to activate their device. Customers who inherit an iPhone can request a SIM card from AT&T and activate at home using iTunes.

AT&T will offer accessory bundle options specific to iPhone 3G S in its retail stores.

Check out the AT&T page for additional details on plans and features. [AT&T]