Develop Bugs

RBT-3000 GPS settings

The settings for my RBT-3000 really confuse me.
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Ok, NMEA/SiRF I understand. The other 6 settings (GGS,GSV,GLL,RMC,GSA,VTG) are part of the NMEA protokoll I think. But what do the numbers do?
What is "Degraded Mode" ?
What's the "DOP mask" ? I can switch between PDOP, HDOP, GDOP and "disabled" and set a value between 1 and 50 for it.
What's the "Elevation Mask" ?
I also have another setting: "SBAS Mode" enabled/disabled what does it do?
Maybe someone here has the answers for me, or can point me to another place where I might find the answers. No luck with google so far.
Thanks.

How to give my Evo to my dad in the DR?

So, my Dad lives in the dominican republic, and I want to give him my old sprint Evo 4G. Claro is a CDMA network down there, as is Orange, and both used to sell the phone down there. So... being a noob, how would i go about doing this so it would work? I have seen threads about unlocking for virgin mobile and boost, so, it sounds like it would be a completely different process? Can he just take the phone in to them? Sorry for the dumb questions. It is rooted already.

over 200 views and no help..

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I am going to make a guess and say that alot of people here are not familiar with those networks.

Thats what I was afraid of... what kind of info would I need to gather?

[Q] Why can't I search for networks

Phone is working fine, can make and receive calls. On a road trip through some remote areas I noticed there was no signal. Upon reaching area with cell service, my phone doesn't seem to "auto detect" it's back in civilization. Always picks up a signal after a re-boot, but that shouldn't be necessary. I figured I could force it to search for networks instead of rebooting, but when I go to the settings, the options are greyed out.
I'm on my 3rd M8 due to their #$&* build quality, all of them were bone stock (no rooting or ROMS) and all have had the search for network option greyed out.
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Carrier Aggregation!

We all know Samsung GS6 is capable of aggregating two separate LTE bands, like Band 12 + Band 4. But has anyone ever seen that actually happening using T-Mobile variant?
By dialing *#0011# you get into the Engineering Mode, where you will be able to observe lots of connectivity. you're looking specifically:
CA:NONE = No carrier aggregation
CA:ADDED = secondary carrier added waiting to engage in downloading
CA:ACTIVATED = your download session is in progress and secondary carrier is fully engaged.
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Please post your finding and market you're located in. Thanks!

Can just use 3G and 4G reception?

Can someone advise if you can choose to only use 3G and 4G (and not 5G) reception only under Network Mode? Attached photo to try and be clearer
https://ibb.co/Fq0cW0b

Emmawii said:
Can someone advise if you can choose to only use 3G and 4G (and not 5G) reception only under Network Mode? Attached photo to try and be clearer
https://ibb.co/Fq0cW0b
Click to expand...
Click to collapse
This for me
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But i select this with code *#*#4636#*#* in the Dial nr/LTE/wcdma
Emmawii said:
Can someone advise if you can choose to only use 3G and 4G (and not 5G) reception only under Network Mode? Attached photo to try and be clearer
https://ibb.co/Fq0cW0b
Click to expand...
Click to collapse