Smart WiFi Bulb Not Responding to Alexa or Google: Fixes

Quick answer

Most voice-control failures come down to three things: the bulb is on a 5 GHz network instead of 2.4 GHz, the pairing or voice-app link went stale, or the bulb and phone are on different accounts. Re-pair the bulb in its own app on a 2.4 GHz network, then relink that app inside Alexa or Google Home. If the bulb still will not appear after two clean attempts, stop and treat it as a hardware or compatibility limit rather than repeating the same steps.

Confirm the bulb itself still works before blaming the assistant

Before you touch Alexa or Google Home, open the bulb's own app and try the on/off control there. If the bulb responds in its native app but not through voice, the problem is the app-to-assistant link, not the bulb or your Wi-Fi. If it does not respond in its own app either, the issue is the network or the pairing, and you should fix that first. This one check tells you which half of the chain to troubleshoot and saves you from resetting everything at once.

Check the 2.4 GHz requirement and your router settings

Many smart bulbs, including the iView ISB600-2, only work with a 2.4 GHz wireless connection. If your router broadcasts one combined network name for both bands, your phone may hand the bulb a 5 GHz connection during setup and the pairing will silently fail. Temporarily split your bands into separate 2.4 GHz and 5 GHz names, connect your phone to the 2.4 GHz one, and run the pairing again. Also confirm the network is not a guest network with client isolation enabled, since that blocks the bulb from being reached even when the password is correct.

• Use a 2.4 GHz SSID during pairing, not a combined or 5 GHz-only network.
• Keep the bulb, router, and phone in the same room while pairing.
• Avoid guest networks or any setting labeled AP isolation or client isolation.

Re-pair the bulb, then relink the voice app

A clean re-pair fixes most cases where Alexa cannot find the smart bulb. Delete the bulb from its native app, reset the bulb to pairing mode, and add it again on the 2.4 GHz network. Once it works in the native app, open Alexa or Google Home and disable, then re-enable, the skill or linked account for that app. This forces the assistant to pull a fresh device list instead of relying on a cached one. Run a device discovery afterward. If the assistant still lists the bulb as offline, remove the old device entry before adding it again, since duplicates often keep the offline status.

Fix account, region, and naming mismatches

Voice assistants only see devices tied to the account you linked. If you set the bulb up under one email and linked a different one to Alexa or Google Home, the bulb will never appear. Confirm both apps use the same account, and check that the region set in the assistant matches the region of your smart-app account, because a mismatch can hide devices from discovery. Finally, rename any bulb that shares a name with another device, such as two bulbs both called Light, and run discovery again so the assistant can tell them apart.

Diagnosis: symptom, likely cause, action, and when to stop

• Bulb works in its own app but not by voice: The native app is fine, so the break is the skill or account link between that app and Alexa or Google Home. Disable and re-enable the skill, then run device discovery. If it still fails after two attempts, stop and check that both apps use the same account and region.
• Bulb is offline in both the app and the assistant: This points to Wi-Fi or pairing, most often a 5 GHz or combined network that the bulb cannot use. Split the bands, connect your phone to 2.4 GHz, and re-pair. If the bulb will not join a confirmed 2.4 GHz network after two resets, stop and treat it as a hardware fault.
• Alexa or Google cannot find the bulb at all: Discovery only returns devices on the linked account, and duplicate or oddly named devices can be skipped. Rename the bulb uniquely, remove old entries, and rediscover. If it never appears, stop and confirm the bulb's app is actually supported by your assistant before buying more devices.

Product facts that affect troubleshooting

• ISB600-2 7W 600lm E26 Smart Multi-Color LED WiFi Bulb works with Alexa and Google Assistant (2-Pack): The iView ISB600-2 smart LED bulb works only with a 2.4 GHz wireless connection and supports app control, voice command, multi-color lighting, and scheduling. If your phone or router pushes the bulb onto 5 GHz during setup, voice control and app control will both fail, so pairing on the correct band is the first thing to verify.
• ISC300 1100W Load Max, 10A Smart WiFi Socket & Plug w/ 5V 2.1A USB Port (Twin Pack): The iView ISC300 smart WiFi socket requires no hub, works with Alexa and Google Assistant, and uses 2.4 GHz Wi-Fi 802.11 b/g/n. If a socket on the same network is also missing from Alexa or Google, the problem is your 2.4 GHz network or linked account, not the bulb alone.