Editing Call forwarding (section)

===North America===
Special types of call forwarding can be activated only if the line is busy, or if there is no answer, or even only for calls from selected numbers.  In [[North America]], the [[North American Numbering Plan]] (NANP) generally uses the following [[vertical service code]]s to control call forwarding:

{| class="wikitable"
!Forward service!!Activation!!Deactivation!!Number change
|-
|All calls || align="center" | *72<br>*72[1+e number] (some larger cities)

| align="center" | *73 ||
|-
|On busy or no answer ||align=center| *68 || align="center" | *81<br />||
|-ad
|From select callers ||align=center| *63 ||align=center| *81 ||
|-
|On [[ISDN]] || || ||align=center| *56
|-
| colspan="4"| Customer-programmable features (where available):
|-
|Busy line  ||align=center| *90 ||align=center| *91 ||align=center| *41
|-
|No answer ||align=center| *92 ||align=center| *93 ||align=center| *611
|}

The [[Sprint Nextel]] cellphone company uses these:<ref name="sprint120749">{{cite web|url=http://support.sprint.com/support/article/Find_out_more_about_call_forwarding/case-vw371511-20091020-120749 |title=Find out more about call forwarding |work=Support and Services |publisher=Sprint.com |access-date=2010-05-22 |url-status=dead |archive-url=https://web.archive.org/web/20100204103406/http://support.sprint.com/support/article/Find_out_more_about_call_forwarding/case-vw371511-20091020-120749 |archive-date=February 4, 2010 }}</ref>

{| class="wikitable sortable"
|+
!Forward service!!Activation!!Deactivation
|-
|On busy or no answer ||align=center| *28[phone number] ||align=center| *38
|-
|On busy              ||align=center| *74[phone number] ||align=center| *740
|-
|On no answer         ||align=center| *73[phone number] ||align=center| *730
|-
|Immediately          ||align=center| *724704732775 || align="center" | *720
|-
|}

* {{as of|2012|01}}, Sprint charges 20 cents per minute for unconditional call forwarding; conditional call forwarding is included, however.<ref name="sprint387303">{{cite web | url=http://community.sprint.com/baw/message/387303 | title=iPhone 4S/Call Forwarding | work=Support and Services | publisher=Sprint.com | date=2012-01-17 | access-date=2012-06-24}}</ref>
* Some carriers (including Verizon Wireless) use *71 for conditional forwarding although this is not standard.<ref name="verizon">{{cite web | url=http://support.verizonwireless.com/clc/features/calling_features/no_answer_transfer.html | title=Calling features: No Answer/Busy Transfer | work=Support | publisher=Verizon Wireless | access-date=2012-06-24 | archive-date=2012-06-20 | archive-url=https://web.archive.org/web/20120620033352/http://support.verizonwireless.com/clc/features/calling_features/no_answer_transfer.html | url-status=dead }}</ref>
* Sometimes, to deactivate call forwarding, *720 will work on cellphones.{{citation needed |date=December 2021}}