Why phone won't connect to wifi internet

Your phone might not connect to WiFi due to a mismatch between the WiFi standards supported by your device and those of your router. Modern iPhones support the latest WiFi standards, such as WiFi 6 (802.11ax) and WiFi 6E, while older routers may only support earlier standards like WiFi 4 (802.11n) or WiFi 5 (802.11ac). This incompatibility can prevent phone from establishing a stable connection and delivering the best speeds. Issues are more likely with the router than the phone. Consider upgrading to a router that supports newer WiFi standards.

WiFi standards

Here are WiFi standards, their typical speeds, starting from WiFi 3

WiFi StandardIEEE StandardFrequency BandsMax Data Rate (Theoretical)Year Introduced
WiFi 3802.11g2.4 GHz54 Mbps2003
WiFi 4802.11n2.4 GHz / 5 GHz600 Mbps2009
WiFi 5802.11ac5 GHz3.5 Gbps2014
WiFi 6802.11ax2.4 GHz / 5 GHz9.6 Gbps2019
WiFi 6E802.11ax6 GHz9.6 Gbps2020
WiFi 7802.11be2.4 GHz / 5 GHz / 6 GHz46 GbpsExpected 2024

iPhone WiFi standards

iPhone models including their Wi-Fi standards and the highest 802.11 standard they support

ModelsWi-Fi StandardHighest 802.11 Standard
11 - 15Wi-Fi 6802.11ax
SEWi-Fi 6802.11ax
16,16 PlusWi-Fi 6E802.11ax
16Pro,16 Pro MaxWi-Fi 7802.11be

discontinued iPhone WiFi standards

iPhone models and their Wi-Fi standards that have been discontinued from support since 7.

ModelsWi-Fi StandardHighest 802.11 Standard
7Wi-Fi 5802.11ac
7 PlusWi-Fi 5802.11ac
8Wi-Fi 5802.11ac
8 PlusWi-Fi 5802.11ac
XWi-Fi 5802.11ac

Samsung phones WiFi speeds

Samsung models feature Wi-Fi 6 (802.11ax) starting from the Galaxy S20 series, including the S20, S20+, S20 Ultra, S20 FE, Note 20, and Note 20 Ultra.

Samsung's older Galaxy models, including the Galaxy S7, S7 Edge, S8, S8+, Note 8, S9, S9+, A10, A20, and A40, use Wi-Fi 5 (802.11ac)​.

Google Pixel phones WiFi

Starting from the Pixel 5, models including the Pixel 6, 6 Pro, 6a, 7, 7 Pro, and 7a feature Wi-Fi 6 (802.11ax)​

Older Google Pixel models, including the Pixel 1, 2, 2 XL, 3, 3 XL, 3a, 3a XL, 4, and 4 XL, use Wi-Fi 5 (802.11ac).

Conclusion

Any mentioned brand phone, even discontinued models, should achieve 600 Mbps WiFi speed, which exceeds most NBN plans. Yet, that would require routers not older than 2015, which may provide such speeds for a few devices connected simultaneously, provided they fully implement the AC (5 GHz) standard.

To achieve maximum theoretical WiFi speeds of 9.6 Gbps, users need AX routers as well as AX models of phones, not older then iPhone 11, Samsung Galaxy S10, or Google Pixel 6.

June 2024