Develop Bugs

[Q] Grey non-working 3G after I lose wifi signal

So, I keep my wifi on mostly at all times. But I've found that when I leave my home, and get outside my wifi range, instead of naturally switching back to 3G (I usually have 4G disabled for battery purposes, unless I need speed), my 3G and bars icon will be all greyed out, and I will have no incoming data. I otherwise have a great signal here in Boston. Sometimes it will eventually start working, but other times I will need to reboot in order to have a working data connection.
Is this an issue anyone else has? It seems the transition from wifi to mobile data is glitchy?

[Q] Random data and reception dropps

Hello everyone
Im having an annoying issue with all ROMS\Kernels. All works fine but sometimes i get random reception drops (signal bar gets blank or black), reception returns but NOT data. If i turn plane mode on\off and data on\off, i get the H to show near the reception bars but i dont get actual data connection. Data returns only after i reboot the device. I tried changing the APN settings, tried using the GetRil app from the market. No change..
Base band: 19250XXLF1
btw the phone is GSM.
thanks for the help

Decrease in mobile data quality?

Hello I live in Miami Florida I just came from a note 2 and prior to that I had an s3.. Both phones while on the HSPA plus APN did very well with speeds. The s4 does pretty well with speeds but I do notice that the data will get stuck sometimes and you see the arrows working as if they are transferring data but in reality its stuck most of the time I have to turn on airplane mode and then turn it off to get my data working again. This happens on any ROM and I never had this problem before this phone. I know that they are working on towers but even on the HSPA plus APN I'm having issues which I never have many issues on this network with other phones. Even on the LTE APN I noticed that a lot of times when switching from LTE to 4G I get so call drops or I get the internet stuck and have to turn on airplane mode even togglingmobile data on and off doesn't help.. Has anyone else experienced this problem I'm wondering if we were going back to the first modem on the first firmware will maybe help? Or is it just them working on the towers? If anyone has a good solution to this please let me know
Sent from my GT-I9505 using xda app-developers app

If you can live without LTE for now, go into Settings -> Connections -> More networks -> Mobile networks -> Network Mode -> select GSM/WCMDA (auto connect)
I've had issues around here where the modem REALLLLY wants to grab LTE, but can't, and gets kind of stuck. But, HSPA+ is also pretty solid around here.

Using WIFI will terminate my Mobile Data connection after turning it off

Hello guys!
Here is the deal. I hope somebody is able to help me. I have a galaxy s6 920p with the ramified ROM (OH1 version on OI1 band) that works perfectly except for this weird issue. So, i am in Peru and i unlocked my phone, it works perfectly with my local carrier on LTE or 3G depending on the coverage EXCEPT when i connect to a wireless network(WIFI), if i do so my LTE 3G icon will dissapear as expected and be replaced with the WIFI bars and i would then be on Wifi internet which is fine. The problem comes when i move away from wifi signal or turn off the WIFI myself, the signal bar will remain full and i can make and receive calls normally but there will be a "!" sign next to it indicating that the mobile data is not working, the only way to fix this is by either rebooting the phone or setting it to flight mode for around 10 seconds and then bringing it back to normal, which makes my mobile data start working normally until the next time i turn on the WIFI. I have also noticed that my APN gets unticked everytime i connect to WIFI, regardless of this sometimes (i would say 30%) if i turn off the wifi the 3g/lte connection will resume normally. I am a pilot and sometimes i keep my phone without airplane mode, in the air i lose signal but as soon as i regain ground i recover my lte/3g, so this also indicates me that is not something related to the reconnection of signal itself but something regarding the WIFI. I hope you guys have any clue of what is going on here because it is really annoying and i haven't found any info about this. TY in advance!!!!

Dual Sim issues

Hello,
I'm using two swedish providers in my phone - 3 and Telenor. Both are capable of LTE/UMTS, I'm using 3 as the primary provider for all options in the Sim settings and the Telenor one only to receive calls.
So I recognized a problem where my data connection would drop when the 'open wifi'-notification popped, I tried to disable that and it seemed fine at first. However I'm still getting data connection drops when me phone swaps from LTE to UMTS(3G/H/H+), no errors are thrown and I'm only seeing it due to no data loading within apps or disconnects in-game, the display isn't dropping the coverage indicator nor the indicator for which network is being used(3G, H, H+, LTE, 4G+). After some time the data connection returns but keeps dropping rather frequently once this pattern starts.
Airplane mode restores connectivity for a while (I haven't clocked it) but eventually the connection stops receiving data and the disconnecting pattern returns.
Calls and SMS are working as far as I've noticed so far.
Any ideas?
Edit: I've restarted the phone multiple times.

Any one got similar issues or any fix :3?