Does not work with the band 8 HSDPA
922938
Verify the band 3g connect at peak efficiency according to information and the phone does not support the 3G only connects to the GSM network. Phone ornaments :&
4515147
Be aware that you can't transmit and receive 5.8 MHz with this card. It did work properly as advertised for 2.4MHz, but I was ignorant about wifi. For my HP Envy laptop, HP steered me away from wifi cards that wouldn't work on 5.8MHz. HP helped me find an Intel AC-3160 card compatible with Bluetooth, 2.4 MHz wifi, and 5.8MHz wifi. I replaced this card with the 3160 card and I can now view networks that I couldn't view before.
1762702
Unfortunately the charm is not compatible with the lates 3G network which wasn't clear in the description.
197451
2,4 GHz band does not works property, a disaster considering the price, support team never reply, however Amazon team accept to return it. I bought another brand. I was looking for several solution before to complain to Amazon, finally I returned it
2036085
Does not work with my phone. Even though my phone is one of the listed models it is compatable with.
4619095
It says it's compatible with at&t but it's not it won't let me use my data I'm pretty mad
2664596
I bought this cellphone and im using it on uruguay. my internet (lte) service provider is antel and it works on 1700/2100 but i cant get it to work.
What could it be?
1450205
It is a great phone.  I have one, as do my wife and son.  This one was spare.  If you break it, just move the SIM and you are good.
It is only HSDPA while the newer ones are LTE, but did I say it was really cheap?
1905148
I spent two hours on the phone with a pleasant and helpful tech support person. She must have gone through every diagnostic and fix they have, until we gave up and I sent the device back. I was never able to connect to either of the networks even though the device indicated they were both functioning correctly.

Also be aware that is not an EXTENDER as advertised, it is an access point, and as such requires it's own two network names and passwords. In other words, you are creating two new networks, one for each band (2.4 GHz and 5 GHz).

If you want a simple extender, that is REASONABLY PRICED, then I recommend the older model of the Diamond Range Extender, model number WR300N. Do not under any circumstances buy the newer model WR300NSI, it is unstable and overheats.
3559965
I spent hours on the phone with AT&T trying to get this product to work. It is apparently an old SIM that is not supported on phones or tablets.
1365223
Even though the overall feedback for this item was not very good, I took a chance and bought it for my AT&T LG G3 D850.  Per the description, it should work for my model - right?  Wrong!  How hard can it be? It's basically a self-stick pad which internally consists of 2 antennas sandwiched together with an extended flat 4 wire pad that's a press fit for the electrical connection when the back case is snapped on.  2 of the 4 pads are for the NFC (Near Field Communications) antenna function (like for Android Pay), and the other 2 pads are for the PMA (Power Matters Alliance) antenna function which is the Wireless Charging.

One thing is obvious about the installation - you MUST make sure that the 4 electrical pads are lined up correctly so that when you reinstall the back case, proper electrical contact will be made.
Well, I took my time and I MADE SURE the pad alignment was perfect.
I even made reference marks where the original working NFC pad was mounted and made SURE this new one was in the EXACT same spot.
In fact, after several removals of the back case I could see little "marks" on each of the 4 pads showing clearly that pressure contact is being made in the center of the pads.

Results: The NFC function worked (Android Pay).  But the Wireless Charging? Nada. Zip. Zero.  Yes, I'm using the correct Duracell Powermat Charger. Also as suggested by others, I tried little magnets here and there. Nope.  I tried a different Powernat Charger. Nope. I went to Starbucks and tried their PMA stations. Nope.  Finally I broke down and bought a new LG Quick Circle Case ($$) for the D850 that includes the NFC & AT&T PMA antennas already installed.  It works Great - both NFC and PMA. (love the Wireless Charging!)

Bottom Line:  This MOSTOP Wireless Charging Sticker refused to work correctly.  I don't know if this is a rare failure or a more common problem.  I suspect the latter. Regardless, it went back for a refund.
3771792
This did NOT work for me. If you are looking at this, just get the NEWEST version stay away from older 3G technology
533504
Although it has a nice picture it will not work with any of the current 5.0 ghz routers, it will only sync up with the old 2.4. It would be nice if this was mentioned clearer if at all.
2189996
In the technical details of the products says:
"Unlocked Dual SIM Quad-Band GSM cell phone compatible with 850/900/1800/1900 MHz (Both SIMs) and GPRS/EDGE data capabilities."

It doesn't work for the EU, I tried in Spain and the UK and it's not working. I don't recommend this product
1275837
It's cute. Problem is it clearly states on the back of the package "Please note: Compatible with GSM networks but will not provide alerts for 3 Networks or 3G enabled phones." Far cry from "Phone charm is compatiable with GSM Networks and may not work with all 3G Networks"  advertised. Disappointed but some say it works on the 4G phones, i will have to use my friends phone and see.

**EDIT 12-11-2013**
As soon as I posted this a text came through and it lit up! Of course, i can't recreate those conditions. But it works sometimes.
3075656
The device itself works great with AT&T as a WIFI based router.
All I needed to do was to find the APN settings for AT&T off the web.

The main problem with the device is the software and the firmware.

The Mobilink 3 software preloaded on the device will not install with
Windows 7 running in 64 bit mode.  The install fails before it can complete.

There is no easy way to find updates to the Mobilink 3 software-
googling turns up nothing.

Also - there is no clear information/downloads for upgrading the
firmware on the device.  It appears that a later firmware may be available-
but there is no way to confirm this.

I will try emailing Novatel - but I don't expect much traction-
as they expect their resellers/retailers to provide support...
756546
HTC cheats people by giving them a partially unloacked AT and T mobile. The mobile hotspot function does not work if you have a sim card of ssome other network. What is the point of unlocking it then. Even rooting does not work since no custom ROMs are available fro Desire. Please do not buy.. Customer care guys also said they cant help. Utterly disappointed.