WONLIVE Metal Mount Plate for Magnetic Phone Car Holder (10 Pack) – Self-adhesive stainless steel plates
Product description
If you’re using a magnetic phone car holder, you’ll know the drill: the phone needs a compatible metal backing, not just any random accessory will do. This 10-pack of WONLIVE metal mount plates is designed to give you that backing in a simple, repeatable way—so you can move between phones (or cases) without wrestling with tools or templates.
In this pack you get a mix of shapes: 6 round plates and 4 rectangular plates, finished in black & silver. The plates are described as stainless steel and very thin (0.5mm), and the idea is to add the metal surface to the back of your phone or to the inside of a case using the self-adhesive backing.
Key features that matter in the real world
The big selling point here is straightforward: adhesive metal plates for magnetic car phone holders. Over the life of a car mount, that’s often what you end up needing most—either because you changed phones, swap between a work and personal device, or you simply don’t want to commit one mount plate to one single phone.
On paper, the appeal is that the plates are lightweight and extremely thin, so they shouldn’t noticeably add bulk to your phone. They’re also intended to be quick to fit and remove without tools, which is useful if you like switching setups or you occasionally share your mount.

It’s also worth noting the sizes are universal within the magnetic-mount world: rectangular plates are listed as 65x45mm, and round plates are listed as 40mm diameter. That gives you options depending on how much real estate you can spare on the back of your phone or where the holder’s magnet needs the metal to sit.
There is a practical limitation to keep in mind: adhesive depends on the surface and how well you prep it. If the area is dusty, oily, or textured in a way that prevents full contact, the plate may not bond as reliably as you’d expect.
What you’ll notice day to day


In day-to-day use, these plates are the kind of small accessory that makes your car kit feel effortless. A typical scenario looks like this: you peel off the blue protective film, line up the plate on the back of your phone, press it in place, and you’re ready for your magnetic holder. When you want to switch devices, you can move the plate to a different phone or install a second one in advance.
Because the plates are described as thin and lightweight, they’re less likely to get in the way when sliding a phone into and out of a case. And if you’re using a magnetic sticker approach already, having a pack like this lets you keep spares so you’re not forced into a last-minute workaround.

That said, they’re not meant to “fix” every magnetic setup. If your car holder is picky about placement, you may need to spend a minute getting the plate positioned so the phone sits securely.
Where it shines (and where it may fall short)
It makes sense if you’re after a practical way to equip multiple devices. The listing specifically calls out use on mobile phones, GPS and mini tablets, and the pack includes both round and rectangular shapes so you’re not locked into one layout.
It might not be the best match if your priority is a permanently invisible modification. Since these are metal plates with an adhesive film, there’s still going to be a slightly raised feel for some phones/cases (even at 0.5mm), and the best placement may depend on your case design.
Tech specs

- Material: Stainless steel
- Thickness: 0.5mm
- Adhesive type: Self-adhesive sticker (blue protective film mentioned)
- Sizes included: Round plates 40mm diameter, rectangular plates 65x45mm
- Pack contents: 10 plates total (6 round and 4 rectangle)
- Colour: Black & silver


Who it’s for (and who should skip it)
Worth considering if you regularly switch phones, use more than one device in your car, or you want replacement plates without having to source something different each time. It’s also handy if your current plate is wearing out or you simply prefer keeping spares.
It may not suit you if you only need one plate and you’d rather avoid spare parts sitting around. It also isn’t ideal if you’re expecting the adhesive to work instantly on any surface regardless of prep—surface cleanliness and full contact matter.
If you’re comparing this to buying a totally new holder, this is the less disruptive route: you keep your mount, and just update the phone-facing metal. If you’re thinking about a basic universal sticker, this pack’s mixed shapes and listed sizes are a sensible step up for flexibility.

Is it worth it?
For most people who already use (or plan to use) a magnetic phone car holder, this WONLIVE metal mount plate pack looks like a useful “kit” purchase. You get thin stainless steel plates, a mix of round and rectangular options, and the ability to stick them to the back of a phone or inside a case without tools.
You should buy it if you want spare plates for multiple devices, or if you like the idea of moving your car mount between phones with minimal hassle.
You may want to skip it if you only need one plate, or if you’re unsure about getting a strong adhesive bond—because the fit and security depends on clean, suitable surfaces and good placement.


Quick FAQ

Do I need tools to fit these plates?
No. The listing describes the installation as quick and notes that it can be installed and disassembled without any tools.
Where can I stick the metal plate?
The guidance provided is to stick it on the back of the phone, or on the back/inside of a phone case.
Are the plates universal for magnetic holders?

They’re described as usable with various magnetic car phone holder types (air vent, windscreen mount, dashboard cradles) and for magnetic phone magnet sticker setups—so they’re aimed at broad compatibility within that style.
Will the plates add bulk to my phone?
They’re described as ultra thin (0.5mm) and lightweight, so the idea is that they won’t noticeably burden the phone.
What devices are mentioned for use?
Mobile phones, GPS, and mini tablets are mentioned as example devices you can apply the plates to.
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