How to Fix "Unable to Obtain IP Address" on Android

The "Unable to Obtain IP Address" error on Android occurs when your smartphone successfully authenticates with a Wi-Fi network using the correct WPA2/WPA3 password, but fails to negotiate a dynamic private IP address with the router during the Dynamic Host Configuration Protocol (DHCP) handshake. Your phone gets stuck in an infinite loop displaying "Obtaining IP address..." before ultimately disconnecting.

This frustrating error affects Samsung Galaxy, Google Pixel, Xiaomi, Motorola, and OnePlus devices alike. Because authentication succeeded, many users assume their phone's Wi-Fi hardware is damaged. In reality, the breakdown almost always stems from router DHCP pool exhaustion, aggressive MAC address randomization conflicts, or corrupt network caches. This guide breaks down the root causes and provides seven verified solutions to restore your mobile Wi-Fi connection.

The Technical Breakdown: Why the DHCP Handshake Fails

Connecting to a Wi-Fi network requires a strict two-stage process:

1. Layer 2 Security Authentication: Your Android phone transmits your Wi-Fi password (pre-shared key) to the wireless access point. The router verifies the cryptographic credentials and establishes an encrypted Layer 2 802.11 link.
2. Layer 3 Network Configuration (The DORA Exchange): Once authenticated, your phone broadcasts a DHCP Discover packet asking the router for an IP address, default gateway, and DNS resolvers. The router replies with a DHCP Offer, your phone issues a DHCP Request, and the router confirms with a DHCP Acknowledge.

The "Unable to obtain IP address" error indicates that Stage 1 succeeded, but Stage 2 failed completely. The router received your phone's request, but either had no available IP addresses left in its DHCP scope, failed to route the offer packet back to your device, or rejected your phone's randomized hardware identifier.

7 Step-by-Step Solutions to Fix the Error on Android

Work through these verified solutions in order of execution speed to resolve the handshake breakdown:

Solution 1: Forget and Reconnect to the Wi-Fi Network

Clearing the network's cached cryptographic state and IP negotiation history forces Android to initiate a clean, fresh connection cycle:

1. Open the Settings app on your Android device and tap Network & internet (or Connections on Samsung).
2. Tap Internet or Wi-Fi.
3. Locate the problematic Wi-Fi network, tap the gear icon next to its name, and tap Forget (trash can icon).
4. Toggle your phone's Wi-Fi off, wait 10 seconds, toggle it back on, select the network, re-enter your password, and tap Connect.

Solution 2: Disable MAC Address Randomization

Introduced in Android 10, MAC Randomization generates a randomized virtual hardware MAC address for every Wi-Fi network you join to prevent retail tracking. However, certain router DHCP servers become confused by randomized MACs, especially after router reboots:

1. Open Settings > Network & internet > Wi-Fi.
2. Tap the gear icon next to your Wi-Fi network name.
3. Tap Privacy (or Advanced > Privacy).
4. Change the setting from "Use randomized MAC (default)" to "Use device MAC" (or "Phone MAC").
5. Disconnect and reconnect to the network. Your router will now identify your phone's permanent hardware NIC, resolving lease table desynchronization.

Solution 3: Manually Assign a Static IP Address on Android

If the router's automated DHCP daemon refuses to lease an address, bypass the DORA exchange entirely by assigning a manual static IP directly in Android settings:

1. Open Settings > Network & internet > Wi-Fi.
2. Long-press the problematic Wi-Fi network and select Modify network (or tap the gear icon > pencil edit icon).
3. Tap Advanced options.
4. Under IP settings, change the dropdown from DHCP to Static.
5. Enter the following network parameters manually:
   • IP Address: Enter an available address matching your router's subnet (e.g., if your router is 192.168.1.1, enter 192.168.1.185).
   • Gateway: Enter your router's exact IP (e.g., 192.168.1.1).
   • Network prefix length: Enter 24 (which corresponds to subnet mask 255.255.255.0).
   • DNS 1: Enter 1.1.1.1 (Cloudflare) or 8.8.8.8 (Google).
   • DNS 2: Enter 1.0.0.1 or 8.8.4.4.
6. Tap Save. Your phone will connect immediately, bypassing the broken DHCP handshake.

Solution 4: Power-Cycle the Wi-Fi Router (Clear DHCP Exhaustion)

In modern smart homes filled with dozens of smart bulbs, plugs, tablets, and streaming sticks, standard consumer routers frequently exhaust their DHCP address pools (running out of available IPs):

1. Unplug the power adapter from your Wi-Fi router.
2. Wait 30 seconds to allow internal volatile memory to discharge.
3. Plug the power cable back in. As the router boots, it clears inactive leases and expands available address slots for your phone. Learn the proper reboot procedure in our guide: How to Restart and Reset Your Router the Right Way.

Solution 5: Toggle Airplane Mode to Flush Android Radio Drivers

Swipe down from the top of your screen to open the Quick Settings shade. Tap the Airplane Mode icon, wait 15 seconds, and tap it again to turn it off. This completely re-initializes your phone's cellular, Bluetooth, and Wi-Fi baseband firmware.

Solution 6: Change Router Wireless Encryption to WPA2/WPA3 Mixed

Older Android devices occasionally fail DHCP negotiation when connected to strict WPA3-Personal networks due to driver incompatibilities. Log into your router's administrative dashboard (e.g., 192.168.1.1) and ensure the wireless security mode is configured to WPA2/WPA3 Personal (Mixed Mode) with AES encryption.

Solution 7: Reset Android Network Settings

If corrupted system caches or conflicting VPN configurations prevent network negotiation, reset Android's network stack to factory defaults:

1. Navigate to Settings > System > Reset options (or General management > Reset on Samsung).
2. Tap Reset Wi-Fi, mobile & Bluetooth (or Reset network settings).
3. Confirm the prompt. (Note: This will erase all saved Wi-Fi networks and Bluetooth pairings, but leaves your photos, apps, and personal data untouched).
4. Reboot your phone and reconnect to your Wi-Fi network.

Diagnostic Troubleshooting Matrix

Once reconnected, check your public network identity and active connection parameters with our free What Is My IP tool.

To learn how to locate your IP parameters across all operating systems, consult our guide on How to Find Your IP Address on Windows, Mac, Android, iPhone and Linux.