Adding a field to checkout for billing information like phone number required by payment method.

All you need to do from a UI standpoint is add a phone number textfield to your billing information customer profile. In your case you can add one when the module is installed but maybe use the payment method settings form to let the admin select the appropriate field to pull a phone number from in case they had already made one. A long as the default field you add isn't "locked," they can always delete it if they already had such a field.

fwiw, we won't be adding phone number support to Address Field.

Wow this is bizarre. I'm also working on this and came here to post this same exact question.

Webengr, obviously it doesn't make sense to work on two modules for the same task here. Want to join forces?

I came from Ubercart (I noticed you posted about porting to DC a while back). I had decided to begin the port over last weekend because of an additional request to do so. I think working together, we can really flesh this module out and add as much support for First Data as possible.

Let me know! Hope to hear from you, otherwise I will continue to develop the module. I'm going to implement Ryan's idea of having the module add a field on install and give the user an option to select the field to use.

Hmm... one example may actually be the Customer module itself. If you look at what it does in hook_enable() or hook_modules_enabled(), it's looking for any newly defined customer profile types and adding a default, non-locked addressfield to the profile types. You can probably copy some code from here and just change it to add a textfield instead of the addressfield. : )

In case anyone else developing a payment implementation...

Ryan's suggestion above worked well. For my work on First Data, I just added a function call in my hook_enable to create a field as well as a field instance, attaching the field instance to the customer profile 'billing' that gets created in the commerce_customer module. The customer module obviously becomes a dependency in this case, but that's okay.

The added phone number field is unlocked, allowing someone to delete it if for whatever reason they already have for billing. The proper field to use for the phone number can be selected in the payment rule's settings.

The only problem I foresee is if a customer does indeed have a billing phone number already added, then there will be two billing phone number fields for a brief time until the admin goes and deletes one =/.

People arriving to this thread trying to figure out why you would need a module/sandbox to add an extra field to the checkout.

It is easily possible to add an extra field to billing information, following https://drupalcommerce.org/user-guide/configuring-creating-customer-prof... (make sure you enabled commerce_customer and commerce_customer_ui).

And also you'll probably want the Telephone module:
https://www.drupal.org/project/telephone

I know this thread is marked as fixed, but since it ranks highly when searching this subject, I thought I'd mention another solution.

First, install addressfield_phone:

https://www.drupal.org/project/addressfield_phone

Yes, I know that the module page points back to this thread. The main issue with the released version of the module is that it doesn't allow you to make phone numbers mandatory.

So, the second step is to apply the patch in this thread which addresses this issue AND allows you to have more than one phone number field in the address:

https://www.drupal.org/node/1870974

This gives you the option when editing a profile to enable a phone field. If you do this, you get a choice of up to 4 phone numbers (Phone, Extension, Fax, Mobile), each of which can be Hidden, Displayed or Required.

At the time of writing, Addressfield Phone was on v1.3 and the patch in #13 applied successfully.

I prefer this solution to simply adding a phone number to the order or the address profile because it is integrated into the Addressfield profile rather than sitting outside it. For example, if you add a separate phone number field to the Shipping address profile, then the phone number field appears at checkout even if "My Shipping information is the same as my Billing information" is checked. This feels clunky to me. On the other hand, it doesn't validate the phone number, which you could do if you added a separate field.

Awesome, thanks for the additional info. : )

Yes, thanks millionleaves!