[Google Pixel XL ROMs, Kernels, Recoveries, & Other] AncientDeveloper:
Also forgot to mention it's running latest bootloader, radio, and vendor.

Would you happen to know if the baked-in SprintDM is the same one as the Google stock one?

Attached & pasted here for your convenience:

11-04 21:49:19.002 1032 1032 W PackageManager: Unknown permission com.qualcomm.permission.USE_QCRIL_MSG_TUNNEL in package com.android.sdm.plugins.sprintdm
11-04 21:49:19.002 1032 1032 W PackageManager: Unknown permission com.android.permission.INJECT_OMADM_SETTINGS in package com.android.sdm.plugins.sprintdm
11-04 21:49:19.002 1032 1032 W PackageManager: Unknown permission com.android.permission.WRITE_OMADM_SETTINGS in package com.android.sdm.plugins.sprintdm
11-04 21:50:27.426 1032 2329 I ActivityManager: Start proc 4348:com.android.sdm.plugins.sprintdm/1001 for broadcast com.android.sdm.plugins.sprintdm/.SprintDMReceiver
11-04 21:50:27.481 4348 4348 W System : ClassLoader referenced unknown path: /system/priv-app/SprintDM/lib/arm64
11-04 21:50:27.510 4348 4348 D SprintDMReceiver: Received intent: android.intent.action.SIM_STATE_CHANGED
11-04 21:50:27.525 4348 4348 D SprintDMHelper: simOperator: 310120
11-04 21:50:27.526 4348 4348 D SprintDMHelper: isUICCSprint: We have a Sprint UICC
11-04 21:50:27.528 4348 4348 D SprintDMReceiver: received ACTION_SIM_STATE_CHANGED
11-04 21:50:27.528 4348 4348 D SprintDMReceiver: ss extra is: LOADED
11-04 21:50:27.537 4348 4348 D SprintDMService: SprintDMService constructed [tid=1]
11-04 21:50:27.559 1032 1087 I ActivityManager: Start proc 4366:com.android.settings/1000 for broadcast com.android.settings/.sim.SimSelectNotification
11-04 21:50:27.564 4348 4348 D SprintDMService: onStartCommand: intent="Intent { act=android.intent.action.SIM_STATE_CHANGED cmp=com.android.sdm.plugins.sprintdm/.SprintDMService (has extras) }" [tid=1]
11-04 21:50:27.564 4348 4348 D SprintDMService: onStartCommand: action="android.intent.action.SIM_STATE_CHANGED" flags=0 startId=1
11-04 21:50:27.608 4366 4366 W System : ClassLoader referenced unknown path: /system/priv-app/Settings/lib/arm64
11-04 21:50:27.618 4348 4348 D SprintDMHelper: simOperator: 310120
11-04 21:50:27.619 4348 4348 D SprintDMHelper: isUICCSprint: We have a Sprint UICC
11-04 21:50:27.630 4348 4348 D SprintDMStateMachine: Last run due to: UICC ID changed from: to: MY_SIM_CARD_ID_HERE
11-04 21:50:27.667 4348 4348 D SprintDMStateMachine: clearing HFA flags
11-04 21:50:27.686 4348 4348 D SprintDMStateMachine: getNextHfaState: PerformDeviceConfigState
11-04 21:50:27.687 4348 4379 D SprintDMStateMachine: CIDC: start HFA session
11-04 21:50:27.688 4348 4379 D SprintDMStateMachine: startHfaDeviceConfig()
11-04 21:50:27.689 4348 4348 D SprintDMService: registering the phone state listener
11-04 21:50:27.704 4348 4348 D SprintDMService: registering the device provisioned listener
11-04 21:50:27.713 4366 4366 D SimSelectNotification: no of slots 1 provision = true
11-04 21:50:27.715 4348 4379 D SprintDMStateMachine: starting FOTA session with alert string [Ljava.lang.String;@8baf316
11-04 21:50:27.734 1032 1088 I ActivityManager: Killing 3565:com.google.process.gapps/u0a84 (adj 906): empty #17
11-04 21:50:27.740 4348 4379 D SprintDMStateMachine: PerformDeviceConfigState: processMessage EVENT_SPRINT_UICC_LOADED
11-04 21:50:27.740 4348 4379 D SprintDMStateMachine: BaseState: ignoring EVENT_SPRINT_UICC_LOADED
11-04 21:50:27.759 4348 4348 D SprintDMHelper: simOperator: 310120
11-04 21:50:27.759 4348 4348 D SprintDMHelper: isUICCSprint: We have a Sprint UICC
11-04 21:50:27.759 4348 4348 D SprintDMService: startService SprintDMService: CONNECTIVITY_ACTION
11-04 21:50:27.759 4348 4348 D SprintDMService: networkInfo extra is: [type: WIFI[], state: CONNECTED/CONNECTED, reason: (unspecified), extra: "MY_WIFI_SSID_HERE", failover: false, available: true, roaming: false, metered: false]
11-04 21:50:27.760 4348 4348 D SprintDMService: networkType extra is: 1
11-04 21:50:27.760 4348 4348 D SprintDMService: isFailover extra is: false
11-04 21:50:27.760 4348 4348 D SprintDMService: noConnectivity extra is: false
11-04 21:50:27.760 4348 4348 D SprintDMService: otherNetworkInfo is: null
11-04 21:50:27.760 4348 4348 D SprintDMService: reason extra is: null
11-04 21:50:27.760 4348 4348 D SprintDMService: extraInfo extra is: "MY_WIFI_SSID_HERE"
11-04 21:50:27.760 4348 4348 D SprintDMService: inetCondition extra is: 100
11-04 21:50:27.769 4348 4348 D SprintDMStateMachine: Data network type is acceptable: 13
11-04 21:50:27.769 4348 4348 D SprintDMService: Listener.onServiceStateChanged() sending event 7
11-04 21:50:27.769 4348 4348 D SprintDMService: Listener.onCallStateChanged(0, "")
11-04 21:50:27.769 4348 4348 D SprintDMService: Listener.onCallStateChanged() sending event 14
11-04 21:50:27.769 4348 4348 D SprintDMService: Listener.onDataConnectionStateChanged(0, 13)
11-04 21:50:27.769 4348 4348 D SprintDMService: mobile data disconnected (FOTA APN may be available)
11-04 21:50:27.770 4348 4348 D SprintDMService: Listener.onOtaspChanged(3)
11-04 21:50:27.770 4348 4348 D SprintDMService: onStartCommand: intent="Intent { act=android.net.conn.CONNECTIVITY_CHANGE cmp=com.android.sdm.plugins.sprintdm/.SprintDMService (has extras) }" [tid=1]
11-04 21:50:27.770 4348 4348 D SprintDMService: onStartCommand: action="android.net.conn.CONNECTIVITY_CHANGE" flags=0 startId=2
11-04 21:50:27.770 4348 4348 D SprintDMService: got connectivity action
11-04 21:50:27.770 4348 4379 D SprintDMStateMachine: PerformDeviceConfigState: processMessage EVENT_MOBILE_DATA_CONNECTED
11-04 21:50:27.770 4348 4379 D SprintDMStateMachine: BaseState: ignoring EVENT_MOBILE_DATA_CONNECTED
11-04 21:50:27.770 4348 4379 D SprintDMStateMachine: PerformDeviceConfigState: processMessage EVENT_VOICE_CALL_ENDED
11-04 21:50:27.770 4348 4379 D SprintDMStateMachine: BaseState: received EVENT_VOICE_CALL_ENDED
11-04 21:50:27.778 1032 3671 D ActivityManager: cleanUpApplicationRecord -- 3565
11-04 21:50:27.779 4348 4348 D SprintDMHelper: simOperator: 310120
11-04 21:50:27.779 4348 4348 D SprintDMHelper: isUICCSprint: We have a Sprint UICC
11-04 21:50:27.779 4348 4348 D SprintDMService: WiFi is connected
11-04 21:50:27.779 4348 4379 D SprintDMStateMachine: PerformDeviceConfigState: processMessage EVENT_WIFI_CONNECTED
11-04 21:50:27.779 4348 4379 D SprintDMStateMachine: BaseState: ignoring EVENT_WIFI_CONNECTED

11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: a: "google/marlin/marlin:7.1.2/NJH47F/4146041:user/release-keys"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: b: "8996-012901-1702171013"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: c: "8996-012001-1704121145"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: d: "marlin"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: e: "google"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: f: "android-google"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: g: 1508968825
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: h: 11745440
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: i: 25
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: j: "marlin"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: k: "Pixel XL"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: l: "google"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: m: "marlin"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: n: false
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: o <
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: a: 2
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: b: "ms-android-google"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: >
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: o <
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: a: 1
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: b: "android-google"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: >
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: o <
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: a: 6
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: b: "am-android-google"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: >
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: q: "2017-10-05"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: >
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: b: 1509846610837
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: e: "310120"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: f: "310120"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: g: "WIFI::"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: h: true
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: i: 0
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: j: 2
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: k <
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: a: 8
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: b: 1
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: c: "unspecified"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: d: ""
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: e: false
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: >
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: l <
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: a: "310120"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: b: "Sprint"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: c: "0"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: d: 0
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: d: 1
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: d: 2
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: e: "310120153100000"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: f: "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
11-04 21:50:32.039 2335 3633 I ProcessCheckinRequest: g: "\346\245"