# do i need a sim if I am not going to use 4G in a 4G WR21 (3G Sprint only)

**URL:** <https://forums.digi.com/t/do-i-need-a-sim-if-i-am-not-going-to-use-4g-in-a-4g-wr21-3g-sprint-only/16374>\
**Category:** Digi TransPort WR (Series)\
**Tags:** 3g, sprint, 4g, sim\
**Created:** [March 3, 2016, 5:29pm UTC](https://forums.digi.com/t/do-i-need-a-sim-if-i-am-not-going-to-use-4g-in-a-4g-wr21-3g-sprint-only/16374 "2016-03-03T17:29:38Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![chuckh311](https://avatars.discourse-cdn.com/v4/letter/c/439d5e/32.png) [@chuckh311](https://forums.digi.com/u/chuckh311)\
**Post date:** [March 3, 2016, 5:29pm UTC](https://forums.digi.com/t/do-i-need-a-sim-if-i-am-not-going-to-use-4g-in-a-4g-wr21-3g-sprint-only/16374/1 "2016-03-03T17:29:38Z")

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**Author:** ![James.Wilson](https://avatars.discourse-cdn.com/v4/letter/j/53a042/32.png) [@James.Wilson](https://forums.digi.com/u/James.Wilson)\
**Post date:** [March 4, 2016, 5:03am UTC](https://forums.digi.com/t/do-i-need-a-sim-if-i-am-not-going-to-use-4g-in-a-4g-wr21-3g-sprint-only/16374/2 "2016-03-04T05:03:36Z")

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Hi

If you have a new wr21 with 4G you will have to have a sim from sprint to use in the router even if you only want to use 3G

regards

James