2 year warranty
Discontinued
Support
Philips Sonicare DiamondClean Prestige 9900Power Toothbrush with SenseIQ
HX9990/31
Discontinued
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Manuals & Documentation
Frequently Asked Questions
What are the brushing modes for my Sonicare toothbrush?
Can I replace the battery of my Sonicare toothbrush?
How do I charge my Sonicare toothbrush?
How do I register my Sonicare toothbrush?
How do I change the intensity settings on my Sonicare toothbrush?
How does the pressure sensor feedback work on my Sonicare toothbrush?
What do the symbols on my Sonicare toothbrush mean?
Which brush head fits my Sonicare toothbrush?
How do I enable or disable the pressure sensor on my Sonicare?
How can I safely dispose of the battery from my Sonicare 9900 Prestige toothbrush?
How does the brushing guidance work in the Sonicare app?
What features can I activate or deactivate from the toothbrush handle?
Do I need an Alexa device to reorder replacement brush heads for my Sonicare?
How does the Scrubbing Feedback feature work?
How does Sonicare 9900 Prestige work with the app?
How do I reorder Sonicare replacement brush heads with Alexa?
How do I disable the Sonicare brush head reordering service?
How does the BrushPacer work on my Philips Sonicare Prestige Toothbrush?
Can I use Sonicare 9900 Prestige if I wear braces or have dental modifications?
How do I turn the Adaptive Intensity feature on and off?
How do I activate the Scrubbing Feedback on my Philips Sonicare?
How do I connect my Philips Sonicare 9900 Prestige toothbrush to the Sonicare app?
How does the Adaptive Intensity feature work?
Can I sync the Sonicare app with the Apple Health app?
How do I change brushing modes on the Sonicare app?
Warranty and service
Check the terms of your warranty and start a product exchange or repair