[Nexus 6 Android Development] ieatacid:
If you're affected by the LTE on boot issue, you can use Tasker to automate resetting it until there's a proper fix. I've been using this for the past week and it works without fail. All it does is, after the phone boots it turns on airplane mode, waits 5 seconds, turns airplane mode off.

- Requires SecureSettings

Profile: Reset Modem
Event: Device Boot
Enter: Toggle Airplane Mode
A1: Secure Settings [ Configuration:Airplane Mode Enabled Package:com.intangibleobject.securesettings.plugin Name:Secure Settings Timeout (Seconds):0 ]
A2: Wait [ MS:0 Seconds:5 Minutes:0 Hours:0 Days:0 ]
A3: Secure Settings [ Configuration:Airplane Mode Disabled Package:com.intangibleobject.securesettings.plugin Name:Secure Settings Timeout (Seconds):0 ]

XML:

<TaskerData sr="" dvi="1" tv="4.8m">
<Profile sr="prof50" ve="2">
<cdate>1452518945004</cdate>
<edate>1453155665433</edate>
<id>50</id>
<mid0>36</mid0>
<nme>Reset Modem</nme>
<Event sr="con0" ve="2">
<code>411</code>
<pri>0</pri>
</Event>
</Profile>
<Task sr="task36">
<cdate>1442591390052</cdate>
<edate>1453155665433</edate>
<id>36</id>
<nme>Toggle Airplane Mode</nme>
<pri>100</pri>
<Action sr="act0" ve="7">
<code>11820</code>
<Bundle sr="arg0">
<Vals sr="val">
<com.intangibleobject.securesettings.plugin.extra.BLURB>Airplane Mode Enabled</com.intangibleobject.securesettings.plugin.extra.BLURB>
<com.intangibleobject.securesettings.plugin.extra.BLURB-type>java.lang.String</com.intangibleobject.securesettings.plugin.extra.BLURB-type>
<com.intangibleobject.securesettings.plugin.extra.ENABLED>true</com.intangibleobject.securesettings.plugin.extra.ENABLED>
<com.intangibleobject.securesettings.plugin.extra.ENABLED-type>java.lang.Boolean</com.intangibleobject.securesettings.plugin.extra.ENABLED-type>
<com.intangibleobject.securesettings.plugin.extra.SETTING>airplane_mode</com.intangibleobject.securesettings.plugin.extra.SETTING>
<com.intangibleobject.securesettings.plugin.extra.SETTING-type>java.lang.String</com.intangibleobject.securesettings.plugin.extra.SETTING-type>
<com.twofortyfouram.locale.intent.extra.BLURB>Airplane Mode Enabled</com.twofortyfouram.locale.intent.extra.BLURB>
<com.twofortyfouram.locale.intent.extra.BLURB-type>java.lang.String</com.twofortyfouram.locale.intent.extra.BLURB-type>
<net.dinglisch.android.tasker.subbundled>true</net.dinglisch.android.tasker.subbundled>
<net.dinglisch.android.tasker.subbundled-type>java.lang.Boolean</net.dinglisch.android.tasker.subbundled-type>
</Vals>
</Bundle>
<Str sr="arg1" ve="3">com.intangibleobject.securesettings.plugin</Str>
<Str sr="arg2" ve="3">Secure Settings</Str>
<Int sr="arg3" val="0"/>
</Action>
<Action sr="act1" ve="7">
<code>30</code>
<Int sr="arg0" val="0"/>
<Int sr="arg1" val="5"/>
<Int sr="arg2" val="0"/>
<Int sr="arg3" val="0"/>
<Int sr="arg4" val="0"/>
</Action>
<Action sr="act2" ve="7">
<code>11820</code>
<Bundle sr="arg0">
<Vals sr="val">
<com.intangibleobject.securesettings.plugin.extra.BLURB>Airplane Mode Disabled</com.intangibleobject.securesettings.plugin.extra.BLURB>
<com.intangibleobject.securesettings.plugin.extra.BLURB-type>java.lang.String</com.intangibleobject.securesettings.plugin.extra.BLURB-type>
<com.intangibleobject.securesettings.plugin.extra.ENABLED>false</com.intangibleobject.securesettings.plugin.extra.ENABLED>
<com.intangibleobject.securesettings.plugin.extra.ENABLED-type>java.lang.Boolean</com.intangibleobject.securesettings.plugin.extra.ENABLED-type>
<com.intangibleobject.securesettings.plugin.extra.SETTING>airplane_mode</com.intangibleobject.securesettings.plugin.extra.SETTING>
<com.intangibleobject.securesettings.plugin.extra.SETTING-type>java.lang.String</com.intangibleobject.securesettings.plugin.extra.SETTING-type>
<com.twofortyfouram.locale.intent.extra.BLURB>Airplane Mode Disabled</com.twofortyfouram.locale.intent.extra.BLURB>
<com.twofortyfouram.locale.intent.extra.BLURB-type>java.lang.String</com.twofortyfouram.locale.intent.extra.BLURB-type>
<net.dinglisch.android.tasker.subbundled>true</net.dinglisch.android.tasker.subbundled>
<net.dinglisch.android.tasker.subbundled-type>java.lang.Boolean</net.dinglisch.android.tasker.subbundled-type>
</Vals>
</Bundle>
<Str sr="arg1" ve="3">com.intangibleobject.securesettings.plugin</Str>
<Str sr="arg2" ve="3">Secure Settings</Str>
<Int sr="arg3" val="0"/>
</Action>
</Task>
</TaskerData>