[Q] XT1058 vs XT1053 & flashing them
I have seen several posts on flashing XT1053(retail/tmobile/developer) firmware on XT1058(AT&T/Rogers/etc) hardware. I believe most people were only doing the OS though and not the entire flash(including the radio/modem)
The XT1053 is FCC ID ihdt56pa2 and includes: gsm 850/900/1800/1900, wcdma 1700/850/1900 and LTE bands 02,04 and 17
The XT1058 is FCC ID ihdt56pa1 and includes: gsm 850/900/1800/1900, wcdma 850/1900 and LTE bands 02,04,05 and 17
So the differences are that the XT1053 supports wcdma 1700 and the XT1058 supports LTE band 05.
Wcdma 1700 is the same frequency range as LTE band 04, LTE band 05 is 850 Mhz. So it would really seem the two models should both be able to support the same frequencies/bands. The iFixit tear down of an XT1058 indicated it has a multimode power amplifier module for Quad-Band GSM / EDGE and Penta-Band (Bands I, II, IV, V, VIII) WCDMA/ HSDPA/ HSUPA/ HSPA+/ LTE. It also has a separate power amp for LTE bands 12 and 17.
I can't see Motorola applying for multiple FCC ID certifications if the hardware really was identical but who really knows what the differences are. Is there a limitation to the total number of bands the phone controller can handle, so in one phone they selected wcdma 1700 and the other they selected LTE band 05? Is it possible AT&T wanted a phone that specifically couldn't do wcdma 1700 mhz?
I'm reasonably new to android and haven't done a lot of flashing, can someone please confirm if the full retail flash from an XT1053 can be loaded into an XT1058 (I assume an unlocked bootloader is required). And if someone has done it can they report back that the radio portion of the flash is updated and what the results are.
I'm also puzzled why Motorola got Canadian certification for the XT1058 model. If they had the XT1053 certified for use in Canada it would work on 5 providers instead of the three the XT1058 supports here(again unless that was purposely selected by Rogers Canada so the phone couldn't be used on two of the other providers here once sim unlocked).