[Razer Phone ROMs, Kernels, Recoveries, & Other Dev] -SKYLINE-:
Sigh, stuck with bootloop on first boot.

[MENTION=4249546]Rox598[/MENTION], What did you do differently?

Using Windows 10. Downloaded Lineage 17.1 (20200410), checksum ok. Downloaded Open Gapps (tried micro, nano and pico at different attempts), checksum ok. Downloaded Magisk 20.4, no checksum available.

No wipe. Booted to recovery (power off, volume up, USB cable) with SIM and sd card in phone. Used Lineage Recovery. Sideload Lineage 17.1 from computer. Reboot to recovery. Sideload Open Gapps from computer. Sideload Magisk 20.4 from computer. Selected "Reboot" in Lineage Recovery.

Stuck on Lineage boot screen (1st attempt with micro waited 3+ hours, 2nd attempt with nano waited 30+ minutes and 3rd attempt with pico waited 30+ minutes) before volume up, USB cable, holding down power to restart into Lineage Recovery for next attempt.

Will try the next few variations while waiting for suggestions (will update outcome after each attempt):

4th attempt, eject SIM and sd card, Lineage, micro and magisk from computer. (Edit: no difference)

5th attempt, keep SIM and sd card in phone, put Lineage, micro and magisk on sd card, install from sd card. (Edit: seems like Lineage Recovery does not support installing from sd card)

6th attempt, keep SIM and sd card in phone, install Lineage and micro from computer without magisk. (Edit: no difference)

7th attempt, keep SIM and sd card in phone, install Lineage only (Edit: no difference)

****Break time****

Before i try more drastic measures, I'm going to power off the Phone and hopefully i can charge it. Edit: still charges but had to fiddle with powering off in Lineage Recovery and plugging/unplugging power cable until the power off charging batter logo came up

****Break time over****

8th attempt, reinstall 17.1 Lineage Recovery by going in to download mode (fastboot) following official Lineage Install guideline (but using "fastboot set_active a" and "fastboot flash boot_a <recovery_filename>.img" as I did in at Post #189), keeping SIM and sd card in phone, install Lineage 17.1, the immediately install micro and magisk without reboot.Edit: no difference

9th attempt, same as 8th attempt but reboot to recovery before installing micro and magisk. Edit: no difference

10th attempt, reinstall 17.1 Lineage Recovery by going in to download mode (fastboot) following official Lineage Install guideline (including using "fastboot flash boot <recovery_filename>.img" from the guideline), keeping SIM and sd card in phone, install Lineage 17.1, reboot to recovery then install micro and magisk.

***break time***

Going to let to boot screen run for about 4 hours and see what happens. 6 hours have past, still stuck on bootloop. That should rule out an extended period for optimizing app.

***break time over***

11th attempt, same as 10th but using (20200406) which I believe is the same as [MENTION=4249546]Rox598.[/MENTION]Edit: no difference

12th attempt, same as 11th but no magiskEdit: no difference

13th attempt, reinstall 16 Lineage Recovery, keeping SIM and sd card in phone, install Lineage 16, MindtheGapps, magisk.... if successful then backup the few things that i have not backed up. IT BOOTS! Lineage boot screen is scrambled, then screen shuts off, but then power on again the phone boots as it should. Will backup stuff that I previously forgot and then move on to the next attempts tomorrow

14th attempt, reinstall 17.1 Lineage Recovery, factory reset > wipe system, keeping SIM in phone, install Lineage 17.1, micro and magisk. Edit: no difference

15th attempt, reinstall 17.1 Lineage Recovery, factory reset > wipe data and wipe system, keeping SIM in phone, install Lineage 17.1, micro and magisk. Edit: IT BOOOOOOOTS! first boot about 15 min. All my apps, data, photos are gone, but I backed up the photos during attempt #13.

Final edit: for those thinking of upgrading from 16 to 17.1, be prepared to wipe your data and system even though the Lineage team says otherwise. I wasted a day and half trying out if there was another way so you don't have to do the same. Best of luck!