Dear All Experts,
Can anyone tell, why we are not having a toggle or checkbox for supported frequency for any UI. I understand from the docs of MediaTek & Qualcomm that same chipset supports multiple bands but unfortunately the frequency supported of two different vendor is different. this proves the support of frequency for a phone is decided on the region it is released. so its all with the driver of modem which decides. can we or do we have an alternate solution to this.
For eg.
I see lenovo VIBE Z2 pro does not have Band 40 LTE support. is there any hope!!!
Kindly give some explanation for the judgement with some reference.
Integrated 4G LTE Advanced World Mode, supporting LTE FDD, LTE TDD, WCDMA (DC-HSUPA), CDMA1x, EV-DO Rev. B, TD-SCDMA and GSM/EDGE
CAT4 speeds of up to 150 Mbps with support for up to 2x10 MHz carrier aggregation
3rd Generation integrated LTE modem, with support for LTE-Broadcast and LTE multimode dual-SIM (DSDS and DSDA)
RF 4th gen power efficient LTE multimode transceiver with Qualcomm RF360™ Front End solution for world mode bands, lower power and PCB reduction
Related
I purchased the newly released UMI X2 Android phone. I am unable to use the TMobile 3G network. I am only able to use 2G/EDGE.
Voice and data quality are very bad, almost the phone is unusable. I spoke with T-Mobile and was informed that my modem does not support 1700 MHz and there are effort to re-farm TMobile network to support 3G on 1900Mhz but not set date yet. When I scan for available network I get three networks were available
T-Mobile 2G
AT&T 3G
AT&T 2G
Operating System: Android 4.2.1 OS
Processor: 1.2GHz MTK MT6589 quad-core processor
Connectivity Technology: GSM network & WCDMA - Standard SIM card
Network Band: GSM 850/900/1800/1900 MHz & WCDMA 850/2100MHz
Data Technology: GPRS, EDGE, HSPA
Baseband version
MOlY.WR8.W1248.MD.WG.MP.V2.P1
I would appreciate any help to get my phone to work on 3G.
YAF, don't think it's possible to get UMI X2 to work with T-Mobile. You need UMTS support on AWS band.
Re-farming of network for 1900MHz support will not help you either - MT6589 only supports 850Mhz (AT&T band) and 2100Mhz(Europe).
Thanks CTPAHHIK
Hello,
Since the receiver in the Nexus 5 is supposed to be able to support "all cellular modes and 2G, 3G and 4G/LTE frequency bands and band combinations that are either deployed or in commercial planning globally" (according to: http://www.qualcomm.com/chipsets/gobi/rf-solutions/rf-transceivers), is it possible to flash the radio firmware so that the American version (D820) can support the other LTE frequencies (such as LTE B3 1800), and the international version (D821) to support the American frequencies?
(References: http://www.extremetech.com/extreme/170166-nexus-5-excellent-global-coverage-perplexing-lte-support
http://www.networkworld.com/community/blog/nexus-5-designed-work-verizon-wireless-and-all-other-networks)
technically the WTR1605L doesn't cover all bands (450 isn't covered )
WTR1605L supported modes
http://images.anandtech.com/doci/6541/IAR Summit Nov 2012_Serge_Jim_Page_20.png
nexus 5 D820 v D821 comparison of frequency bands
http://www.extremetech.com/extreme/170166-nexus-5-excellent-global-coverage-perplexing-lte-support
and remember, it's just the transceiver. other components must support the bands as well (antenna, modem chip (inside the Snapdragon 800 SoC) itself, power amplifier...)
// would also like to know the (physical) differences, eg chip vs software/baseband/firmware differences? so far on google, people just say "D820 v D821 = here is a list of LTE bands they each support"
Some phones support the 1700/2100 frequency band 4 on lte technology but say they don't have support for the 1700/2100 umts technology. They are the same band and frequency right so why don't they say they can work on umts and lte for the 1700/2100 band? Are the signals for those bands separate from the technology, gsm umts or lte? This is mainly for Verizon phones. Also for phones that have different variants of frequency support are they different in hardware or on a software/firmware level?
Why do certain phones support just specific bands for each technology, gms/lte/umts and the like? I don't see why the phone cannot just recieve signals from a range of frequencies then usuing different technologies to read the frequencies at each level. Like some phones support the 1700/2100 lte band but don't support the 1700/2100 on umts/gsm? Are the phones just locked for the different frequencies on those technology due to corporations?
Just wanted to post this as I'm at T-Mobile user and just recently found out that they also use Band 5. So we will be able to use at least Bands 2, 4, 5, and 12. T-Mobile LTE Bands Now what would be awesome would be able to add band 66 or even convert a band. Now sure if thats possible, just wishful thinking.
Been reading about tmobil and sprint for assurance wireless all day just seen your post thank you. Trying to port number to k40 phone but uses sprint towers and sim but am getting closer and closer. Useful info. Here is the site info I found right before this post:
In most markets the T-Mobile 3G / 4G network operates in the Advanced Wireless Services (AWS) 1700/2100 MHz band and/or the Personal Communications Services (PCS) 1900 MHz band using Universal Mobile Telecommunications System (UMTS) and High Speed Packet Access (HSPA) technology. T-Mobile also operates in the 700 MHz band in some markets. 5G devices on T-Mobile’s network must support either 660 MHz (low-band) or 28/39 GHz (mmWave). In order to connect to the T-Mobile 3G / 4G network a device must support UMTS and HSPA technology in the AWS 1700/2100 MHz band and PCS (1900) band. The T-Mobile 2G network operates in the Personal Communications Services (PCS) (1900) band. To connect to this network a device must support GSM technology in the PCS 1900 band
so now i know which towers sprint and assurance can work on for on this much beter phone once i change some settings which i am hoping can be done all by using the built in phone code and changing the settings and adding a custom rom recovery with the use of no PC via ENGINEERING MODE. Any ideas or thoughts, or should I not have wasted your time.