[Sony Xperia S, Acro S, Ion] Erachter:
build.prop

Here is the signal problem: (thx Forzaferrarileo)

[ 02-20 18:46:22.679 1429: 1429 W/SignalStrength ]

Signal before validate=SignalStrength: 10 255 -1 -1 -1 -1 8 99 2147483647 2147483647 2147483647 2147483647 2147483647 cdma

[ 02-20 18:46:22.679 1429: 1429 W/SignalStrength ]

Signal after validate=SignalStrength: 10 255 -120 -160 -120 -1 8 99 2147483647 2147483647 2147483647 2147483647 2147483647 cdma

[ 02-20 18:46:22.679 597: 1492 W/SignalStrength ]

Size of signalstrength parcel:168

[ 02-20 18:46:22.679 597: 1492 W/SignalStrength ]

getLTELevel - rsrp:2147483647 snr:2147483647 rsrpIconLevel:-1 snrIconLevel:-1

[ 02-20 18:46:22.679 597: 1492 W/SignalStrength ]

getLTELevel - rssi:99 rssiIconLevel:0

[ 02-20 18:46:22.679 597: 1492 W/SignalStrength ]

getTdScdmaLevel = 0

[ 02-20 18:46:22.679 597: 1492 W/SignalStrength ]

getGsmLevel=3

[ 02-20 18:46:22.689 597: 625 W/CNE ]

mDefaultApnLinkProp is null

[ 02-20 18:46:22.689 597: 625 I/CNE_DEBUG ]

getSignalStrength networkType= 0

[ 02-20 18:46:22.689 597: 625 I/CNE_DEBUG ]

CNE sendWwanStatus - type:0 strength:-1 ipV4Addr:null roaming:0 iface:null timeStamp:2013-02-20 18:46:22.697

[ 02-20 18:46:22.689 597: 625 I/CNE_DEBUG ]

UpdateWwanStatus type=0 state=4 rssi=-1 roaming=0 ipV4Addr=null iface=null timeStamp=2013-02-20 18:46:22.697

[ 02-20 18:46:22.689 1341: 1354 W/SignalStrength ]

Size of signalstrength parcel:172

[ 02-20 18:46:22.689 597: 1492 W/SignalStrength ]

getLevel=3

[ 02-20 18:46:22.739 1341: 1341 W/SignalStrength ]

getLTELevel - rsrp:2147483647 snr:2147483647 rsrpIconLevel:-1 snrIconLevel:-1

[ 02-20 18:46:22.739 1341: 1341 W/SignalStrength ]

getLTELevel - rssi:99 rssiIconLevel:0

[ 02-20 18:46:22.739 1341: 1341 W/SignalStrength ]

getTdScdmaLevel = 0

[ 02-20 18:46:22.739 1341: 1341 W/SignalStrength ]

getGsmLevel=3

[ 02-20 18:46:22.739 1341: 1341 W/SignalStrength ]

getLevel=3

[ 02-20 18:46:22.739 1341: 1341 W/SignalStrength ]

getLTELevel - rsrp:2147483647 snr:2147483647 rsrpIconLevel:-1 snrIconLevel:-1

[ 02-20 18:46:22.739 1341: 1341 W/SignalStrength ]

getLTELevel - rssi:99 rssiIconLevel:0

[ 02-20 18:46:22.739 1341: 1341 W/SignalStrength ]

getTdScdmaLevel = 0

[ 02-20 18:46:22.739 1341: 1341 W/SignalStrength ]

getGsmLevel=3

[ 02-20 18:46:22.739 1341: 1341 W/SignalStrength ]

getLevel=3

[ 02-20 18:46:22.739 1341: 1341 D/StatusBar.NetworkController ]

onSignalStrengthsChanged signalStrength=SignalStrength: 10 255 -120 -160 -120 -1 8 99 2147483647 2147483647 2147483647 2147483647 2147483647 gsm|lte level=3

[ 02-20 18:46:22.739 1341: 1341 D/StatusBar.NetworkController ]

No service

[ 02-20 18:46:22.739 1341: 1341 D/StatusBar.NetworkController ]

refreshViews: Data not connected!! Set no data type icon

[ 02-20 18:46:22.739 1341: 1341 D/StatusBar.NetworkController ]

refreshViews connected={ } level=3 combinedSignalIconId=0x7f0200aa/com.android.systemui:drawable/stat_sys_signal_null combinedActivityIconId=0x0 mobileLabel=No service. wifiLabel= emergencyOnly=true combinedLabel=No service. mAirplaneMode=false mDataActivity=0 mPhoneSignalIconId=0x7f0200aa mDataDirectionIconId=0x0 mDataSignalIconId=0x7f0200aa mDataTypeIconId=0x0 mNoSimIconId=0x0 mWifiIconId=0x0 mBluetoothTetherIconId=0x10808c3

[ 02-20 18:46:22.739 1341: 1341 D/StatusBar.NetworkController ]

onSignalStrengthsChanged signalStrength=SignalStrength: 10 255 -120 -160 -120 -1 8 99 2147483647 2147483647 2147483647 2147483647 2147483647 gsm|lte level=3

[ 02-20 18:46:22.739 1341: 1341 D/StatusBar.NetworkController ]

No service

[ 02-20 18:46:22.739 1341: 1341 D/StatusBar.NetworkController ]

refreshViews: Data not connected!! Set no data type icon

[ 02-20 18:46:22.739 1341: 1341 D/StatusBar.NetworkController ]

refreshViews connected={ } level=3 combinedSignalIconId=0x7f0200aa/com.android.systemui:drawable/stat_sys_signal_null combinedActivityIconId=0x0 mobileLabel=No service. wifiLabel= emergencyOnly=true combinedLabel=No service. mAirplaneMode=false mDataActivity=0 mPhoneSignalIconId=0x7f0200aa mDataDirectionIconId=0x0 mDataSignalIconId=0x7f0200aa mDataTypeIconId=0x0 mNoSimIconId=0x0 mWifiIconId=0x0 mBluetoothTetherIconId=0x10808c3