# ESP8266 wifi not working properly with new cellphone tethering (4G) **URL:** \ **Category:** Factual Questions\ **Created:** [September 28, 2019, 7:00am UTC](https://boards.straightdope.com/t/esp8266-wifi-not-working-properly-with-new-cellphone-tethering-4g/840942 "2019-09-28T07:00:13Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![komolono](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/komolono/32/532_2.png) [@komolono](https://boards.straightdope.com/u/komolono)\ **Post date:** [September 28, 2019, 7:00am UTC](https://boards.straightdope.com/t/esp8266-wifi-not-working-properly-with-new-cellphone-tethering-4g/840942/1 "2019-09-28T07:00:13Z")
I just replaced my old Huawei P8 with P30 and could not get my esp8266 work as a webserver. Esp8266 smartconfig app easily changed the two networks. After a couple of tests, I lowered my primary phone connection from 4G to 3G…and my system worked again. Does this make any sense - wifi tethering not working with esp when phone connected to 4G+ (300mbps). Actually I should do more testing, but one or two persons using my system may be having the same issues…So I decided to use [straightdope.com](http://straightdope.com) rather than any esp-related forum (because these people are there). ---
**Author:** ![komolono](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/komolono/32/532_2.png) [@komolono](https://boards.straightdope.com/u/komolono)\ **Post date:** [September 28, 2019, 7:11am UTC](https://boards.straightdope.com/t/esp8266-wifi-not-working-properly-with-new-cellphone-tethering-4g/840942/2 "2019-09-28T07:11:38Z")
You might suggest that I only received a bad phone, but I tested wifi tethering with a laptop and a tablet… ---
**Author:** ![ftg](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/ftg/32/2801_2.png) [@ftg](https://boards.straightdope.com/u/ftg)\ **Post date:** [September 28, 2019, 11:33am UTC](https://boards.straightdope.com/t/esp8266-wifi-not-working-properly-with-new-cellphone-tethering-4g/840942/3 "2019-09-28T11:33:22Z")
Major WAG: Is IPv6 turned on? Does your set up need it? A lot of such problems can be “fixed” by turning off IPv6. ---
**Author:** ![komolono](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/komolono/32/532_2.png) [@komolono](https://boards.straightdope.com/u/komolono)\ **Post date:** [September 29, 2019, 11:24am UTC](https://boards.straightdope.com/t/esp8266-wifi-not-working-properly-with-new-cellphone-tethering-4g/840942/4 "2019-09-29T11:24:36Z")
After another test, it seems that all the surrounding wifi nets might have affected my net. Taken outdoors, everything worked as before… I think there is no reason to continue with this thread…