Thank you very much for your post, it sheds some lights on the subject.
Well, you say "I'm not sure there is a bootloader", but bootloader is a mandatory piece of the boot chain followed by any device or computer able to boot operating systems, so every device has one; the device might not have a fastboot interface implemented, which is different...but yet annoying...
Standard root tools don't work, I agree, that's why we are looking for developer or board tinkerers help here
I'm 100% sure those bands are not unlocked, because my Italia Samsung Galaxy S5 sees LTE connection, while the Palm doesn't. Also see Palm specs here:
GSM / HSPA / LTE
GSM 850 / 900 / 1800 / 1900
HSDPA 850 / 1700(AWS) / 1900 / 2100
LTE band 2(1900), 4(1700/2100), 5(850), 12(700), 13(700), 17(700), 66(1700/2100)
HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
You can see Italian LTE bands here:
B3 (1800 +)
B20 (800 DD)
I also contacted Palm support for the bands, requesting to unlock them in the firmware and they told me "Support for those bands is a hardware limitation, rather than something we can control in firmware. Unfortunately, those phones can't be made compatible with some 4G networks."...BUT DO YOU BELIEVE THEM?...
So, yes, I do have another device with those bands unlocked if needed.
With QPST there's no need to be careful until I find a way to make it communicate in read/write with the Palm (just kidding)
Maybe if someone has opened a Palm phone and seen the internal board and knows how to perform electronic tampering, he can tell us what hardware components are involved in LTE communication (I think its embedded in the CPU...Qualcomm MSM8940 Snapdragon 435 (28 nm)...see the following link: http://phonedb.net/index.php?m=proce...detailed_specs ...it states:
Supported Cellular Data LinksList of supported cellular data links CSD 9.6 kbpsCircuit Switched Data (CSD) is the original data link protocol of GSM. Up to 9600bit/s download speed , GPRS (Class unspecified)General Packet Radio Service , EDGE (Class unspecified)Enhanced Data Rates for GSM Evolution also known as Enhanced GPRS (EGPRS) , UMTS 384 kbps (W-CDMA)Universal Mobile Telecommunications System. UMTS Release '99 data link layer, W-CDMA grants up to 384 kbit/s pocket-switched download speed. , HSUPA (Cat. unspecified)High-Speed Uplink Packet Access is a 3.5G UMTS uplink protocol. , DC-HSDPA 42.2 Mbps (Cat. 24)Dual-carrier HSPA+ 42.2 Mbps , cdmaOne (IS-95) , CDMA2000 1xRTT (IS-2000) , CDMA2000 1xEV-DO Rel. 0 , CDMA2000 1xEV-DO Revision A , CDMA2000 1xEV-DO Revision B , TD-SCDMATime Division Synchronous Code Division Multiple Access is the implementation of UMTS (3G) cellular network in China. , LTE (Cat. unspecified)LTE (Long Term Evolution) or the E-UTRAN (Evolved Universal Terrestrial Access Network), introduced in 3GPP R8, is the 4G access part of the Evolved Packet System (EPS). , LTE 300 Mbps / 100 Mbps (Cat. 7)More exact values: LTE 301 Mbps / 100.8 Mbps (Cat. 7) data links
So I don't see why it doesn't support Italian bands, it makes no sense to me.
An electronic board tinkerer would help us a lot, possibly shorting some JTAG pins inside, maybe to disable read/write protection and, maybe, enable Emergency Download Mode with COM port in 9006 mode or some Diagnostic modes (not the 9008 mode, which was the only one I was able to achieve!)
In this forum where do you ask if you want to ask someone to help you connecting remotely to your phone to do live operations on it, using remote COM port software or remote control software (like TeamViewer) or if you need someone able to tinker with board circuitry?
I'm cooking my brain too and I would like to perform the operations you need too for battery life improvement and for my personal cullture, to possibly become of some help for this community, if someone teaches me these things..