[Sony Xperia M4 Aqua] porio:
Hi,

I recently become a proud (¿?) owner of a M4 aqua dual (E2363). I'm almost happy with the unit (because I got one with 16Gb), but I find that the GPS performs really bad. It is not specially slow to lock, but it is very prone to loose the GPS signal and start locking again, specially when moving fast (i.e. in the car). Also the tracking is irregular, so when I go out running the program (runtastic) keeps giving annoying messages about falling in and out of the target pace.

Has anybody had similar problems?

the content of gps.conf is below, and I wonder if there is somtehing there that can be improved for my region (I'm in Chile, Southamerica). I haven't edited anything because I haven't (yet) rooted my phone.

Or is it just that the GPS antenna is weak or defective?.

#Uncommenting these urls would only enable
#the power up auto injection and force injection(test case).
#XTRA_SERVER_1=http://xtrapath1.izatcloud.net/xtra2.bin
#XTRA_SERVER_2=http://xtrapath2.izatcloud.net/xtra2.bin
#XTRA_SERVER_3=http://xtrapath3.izatcloud.net/xtra2.bin

#Version check for XTRA
#DISABLE = 0
#AUTO = 1
#XTRA2 = 2
#XTRA3 = 3
XTRA_VERSION_CHECK=0

# Error Estimate
# _SET = 1
# _CLEAR = 0
ERR_ESTIMATE=0

#Test
NTP_SERVER=time.gpsonextra.net
#Asia
# NTP_SERVER=asia.pool.ntp.org
#Europe
# NTP_SERVER=europe.pool.ntp.org
#North America
# NTP_SERVER=north-america.pool.ntp.org

# DEBUG LEVELS: 0 - none, 1 - Error, 2 - Warning, 3 - Info
# 4 - Debug, 5 - Verbose
# If DEBUG_LEVEL is commented, Android's logging levels will be used
# DEBUG_LEVEL = 3
DEBUG_LEVEL = 4

# Intermediate position report, 1=enable, 0=disable
INTERMEDIATE_POS=0

# Below bit mask configures how GPS functionalities
# should be locked when user turns off GPS on Settings
# Set bit 0x1 if MO GPS functionalities are to be locked
# Set bit 0x2 if NI GPS functionalities are to be locked
# default - non is locked for backward compatibility
#GPS_LOCK = 0

# supl version 2.0
SUPL_VER=0x20000

# Emergency SUPL, 1=enable, 0=disable
SUPL_ES=1

#Choose PDN for Emergency SUPL
#1 - Use emergency PDN
#0 - Use regular SUPL PDN for Emergency SUPL
USE_EMERGENCY_PDN_FOR_EMERGENCY_SUPL=1

#SUPL_MODE is a bit mask set in config.xml per carrier by default.
#If it is uncommented here, this value will over write the value from
#config.xml.
#MSA=0X2
#MSB=0X1
#SUPL_MODE=

# GPS Capabilities bit mask
# SCHEDULING = 0x01
# MSB = 0x02
# MSA = 0x04
# ON_DEMAND_TIME = 0x10
# GEOFENCE = 0x20
# default = ON_DEMAND_TIME | MSA | MSB | SCHEDULING | GEOFENCE
CAPABILITIES=0x13

# Accuracy threshold for intermediate positions
# less accurate positions are ignored, 0 for passing all positions
# ACCURACY_THRES=5000

################################
##### AGPS server settings #####
################################

# FOR SUPL SUPPORT, set the following
# SUPL_HOST=supl.host.com or IP
# SUPL_PORT=1234
SUPL_HOST=supl.sonyericsson.com
SUPL_PORT=7275

# FOR C2K PDE SUPPORT, set the following
# C2K_HOST=c2k.pde.com or IP
# C2K_PORT=1234

# Bitmask of slots that are available
# for write/install to, where 1s indicate writable,
# and the default value is 0 where no slots
# are writable. For example, AGPS_CERT_WRITABLE_MASK
# of b1000001010 makes 3 slots available
# and the remaining 7 slots unwritable.
#AGPS_CERT_WRITABLE_MASK=0

####################################
# LTE Positioning Profile Settings
####################################
# 0: Enable RRLP on LTE(Default)
# 1: Enable LPP_User_Plane on LTE
# 2: Enable LPP_Control_Plane
# 3: Enable both LPP_User_Plane and LPP_Control_Plane
LPP_PROFILE = 0

################################
# EXTRA SETTINGS
################################
# NMEA provider (1=Modem Processor, 0=Application Processor)
NMEA_PROVIDER=0
# Mark if it is a SGLTE target (1=SGLTE, 0=nonSGLTE)
SGLTE_TARGET=0

##################################################
# Select Positioning Protocol on A-GLONASS system
##################################################
# 0x1: RRC CPlane
# 0x2: RRLP UPlane
# 0x4: LLP Uplane
# 0x8: LPP CPlane
A_GLONASS_POS_PROTOCOL_SELECT = 15

###########################################
# Enable/Disable reading H-SLP address and
# certificates from the SIM card
###########################################
# 0: Disable (Default)
# 1: Enable
ENABLE_READ_FROM_SIM = 0