Reputation
396
Next privilege 500 Rep.
Access review queues
Badges
2 12
Newest
 Critic
Impact
~14k people reached

Jan
23
awarded  Critic
Jan
23
comment Is there a way to see which apps are using GCM?
Unfortunately, some apps (e.g. Facebook, Instagram, FB Messenger) request the GCM permission but still establish their own persistent background sockets and services.
Jan
23
comment How is WhatsApp able to receive messages when not in use?
From what I've seen, they use GCM if it is available. If it is unavailable for some reason (e.g. on a device without Play services or if filtered by the network), the socket is kept around indefinitely.
Jan
23
comment How is WhatsApp able to receive messages when not in use?
Unfortunately, incoming TCP connections are next to impossible on mobile devices. The overwhelming majority of them do not have public IP addresses, and even if they do (e.g. for IPv6 capable operators), incoming connections are usually filtered. Most applications today either use Google's push services or roll their own persistent client to server socket connection (most notably Facebook). WhatsApp seems to take a hybrid approach, in my experience: If GCM is available, the persistent socket is closed after being idle for a few minutes.
May
30
awarded  Curious
May
29
asked Can APK expansion files be moved to the SD card without root on the Moto G (Android 5.0)?
May
14
accepted Does “trusted device” unlocking work with an encrypted device?
May
13
answered Does the lock screen on a encrypted device provide different security than an unencrypted device?
May
13
asked Does “trusted device” unlocking work with an encrypted device?
Dec
26
comment Adjust SMS length limit?
That's technically correct, but a protocol to split and reassemble larger messages has been around for many years and is supported by almost every phone since the early 2000s.
Jul
2
asked Is voice recognition on Android Wear performed on the device?
Jun
24
awarded  Citizen Patrol
Sep
4
asked Performance impact of device encryption
May
15
awarded  Informed
Mar
20
awarded  Notable Question
Nov
7
awarded  Yearling
Oct
24
awarded  Popular Question
Jul
20
awarded  Editor
Jul
20
awarded  Excavator
Jul
20
revised Does android 2.1 have any specific built-in ebook apps?
aldiko now supports the adobe drm.