I have an HTC Windows Phone 8X that is branded AT&T, and is carrier unlocked. I am using my T-Mobile SIM card, but am only getting EDGE data speeds. I contacted HTC and here is their response:
Thank you for your email. It is my understanding that your AT&T branded Windows 8X phone will not work on anything other than Edge on the T-Mobile network.
Bryan, we can only guarantee that the phone will work properly on the AT&T network as it was designed for this network. If the phone will not pick up other than Edge, then that has to do with the frequency range that T-Mobile's network has allocated to you.
The network specs for the AT&T Windows 8X are:
GSM/GPRS/EDGE: 850/900/1800/1900 MHz HSPA/WCDMA: 850/1900/2100 MHz LTE:700/850/AWS/1900 MHz
The network specs for the T-Mobile Windows 8X are:
GSM/GPRS/EDGE: 850/900/1800/1900 MHz HSPA/WCDMA: 850/1900/2100 MHz
If you know someone with an active AT&T SIM card, put that in your phone. If the phone gets 4G, then you will know for certain that it is not the phone.
I had an HTC Sensation and was getting 4G speeds in my coverage area. The frequencies are the same on the AT&T and T-Mobile HTC 8X phones, so I don't understand why I can't get 3G data speeds?
Unlocked phones are working with tmobile however there's no guarantee that it will work the same as how tmobile branded phones work. Calling and texting are 90% will gonna work but when it comes to internet service no assurance of getting its connection. I suggest the phone has to be configured first thru tmob systems so that at least you will get better connection.
veronica22 wrote: I suggest the phone has to be configured first thru tmob systems so that at least you will get better connection.
I suggest the phone has to be configured first thru tmob systems so that at least you will get better connection.
What do you mean by "configuring through T-Mobile systems?"
Tmob system has to get thru you're phone, in other words, system has to get updated as to the type of phone you are using. And some configurations and set ups that should be performed.if issue persist, reps would definitely tell the next step.
The phone will behave differently than a native 4g tmobile device such as the Sensation. The device does have a 1900MHz so in areas where T-Mobile has refarmed it should pick up 3G signal. T-Mobile currently does not have a map available but you can look at users with unlocked devices in which have created a site. Edit as their site may be down or has been removed
They have not refarmed many areas and the ones they have are big cities.
Check your internet apn setting. It should read, or put in "epc.tmobile.com". When I was in a roaming or 2g are, I had issues. That helped
I've been experiencing pretty much the same thing after transitioning to T-Mobile from AT&T. After a great deal of digging, I have discovered that the problem lies with the Band IV frequency that T-Mobile uses for their 3G/4G service in non-refarmed areas (most of the country). This band is unique to T-Mobile here in the US and is not supported by most other carrier's phones - even when unlocked. The end result is that unless you're in one of the areas that has been refarmed, you will get extremely slow EDGE service at best.
Unfortunately, T-Mobile does not make a habit of telling potential customers about this limitation until after you have transitioned. End result -- plan on purchasing new phones from T-Mobile or buying one of the phones that does support T-Mobiles Band IV frequency (a list of compatible phones is available on the site).
***outside website removed***
In this press release about bringing your own phone, it does state non branded Tmobile phones have limited
We do try to be very transparent with the fact not all unlocked devices will be compatible with our network. The link that gramps posted shows this, as do other links such as this T-Mobile Internet and MMS settings: Apple iPhone
Our network uses the 1700/2100 whereas many other devices use 1900.
Please let us know if you have any further questions!
I also have this very same scenario. At&t unlocked HTC 8x with T-mobile SIM and I only get EDGE speeds. Do we have any updates (whether good or bad) regarding this situation? Are there any new workarounds to get any faster than EDGE?
Wait till T-Mobile finishes restructuring their network to accommodate 1900 for HSPA+, or find a device that supports 1700/2100 as well as 1900 for HSPA+.
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