umi max major bugs

PVK

\n\nMy 3G or 4G does not turn on every time I want. It does loose connecton as well. I did factory reset, but it did not work. I have changed my SIM card hoping that is the problem, but the problem still exists. I did not have that problem with the older SIM card with another phone, but still I decided to change it just in case.
I am from Bulgaria. My service provider is Mtel - official provider, but I am using one of their official services called BOB. I have only used this ROM so far, I am using only one SIM card now.

MarcinP

By my opinion you using third party network provider and I think this is causing you 3G/4G issues. As you know every network could be overloaded and then main network provider changing band for third party network provider to be not loosing network speed for they own customers.
I know this as I was using third party network provider to which was causing same problems, then I decided join to main network provider since this there is no issues with signals.
I can see that you have latest software. If you have some friends which using main network provider you can ask for sim card for trying or you can go to network store and ask for sim card sample to check network signal.

MarcinP

You can try go to settings - more - mobile network and set manually only 3G to check will you lose signal again.
Then go to settings - more - network operator and check do you have 4G, 3G your own network provider and choose 3G.
Test for few days.
If everything will be fine and you operator supporting 4G do exactly same thing with 4G and test for few days.
Then you can come back to auto operator mode.

PVK

MarcinP replied at 2016-12-22 02:15
You can try go to settings - more - mobile network and set manually only 3G to check will you lose s ...

Ok, I will do so and let you know!

PVK

PVK replied at 2016-12-22 15:01
Ok, I will do so and let you know!

I have tried that and it does not help. My son is using the same provider and he does not have any problem. So, that means there is a problem with the phone - software or hardware. The seller offered to fix it, but I can not send the phone back since the post office is not allowed to send batteries. Still looking for sollution, hope I did not stuck with that problem. If so, that will be my last UMI experience - so frustrating!

gushubble

How can improve front microphone.
My interlocutor does not listen to me and only does it if I speak through the rear microphone
Thanks

MarcinP

PVK replied at 2016-12-22 21:46
I have tried that and it does not help. My son is using the same provider and he does not have any ...

HiYou should compare network bands and umi max and other your or your son phone. If there is no matching between phone and network band then you can't do nothing with this. Here you have umi max specifications
http://www.umidigi.com/page-umi_max_specification.html
And here you can check network bands
http://maps.mobileworldlive.com/

MarcinP

PVK replied at 2016-12-22 21:46
I have tried that and it does not help. My son is using the same provider and he does not have any ...

Here is another information about virtual network called BOB
https://en.m.wikipedia.org/wiki/Bob_(mobile_operator)

PVK

MarcinP replied at 2016-12-24 04:23
Here is another information about virtual network called BOB
https://en.m.wikipedia.org/wiki/Bob_( ...

I don't understand much about frequencies and bands, but I found some information about the provider's bands. thers is som info in Cyrilic but you can see the frequencies. Can you check and see if there is a problem?

GSM900:
895,800-905,000MHz –Предаване от мобилниустройства към базови станции
940,800-950,000MHz – Предаване от базови станциикъм мобилни устройства
Модулация: GMSK, 8PSK;
200kHz ширина на честотен канал;
FDD – дуплексно отстояние 45MHz
TDMA – метод за достъп.

EGSM900:
880,200-881,800MHz – Предаване от мобилниустройства към базови станции
925,200-926,800MHz – Предаване от базови станциикъм мобилни устройства
Модулация: GMSK, 8PSK;
200kHz ширина на честотен канал;
FDD – дуплексно отстояние 45MHz
TDMA – метод за достъп.

DCS(GSM1800):
1710,200-1720,000MHz - Предаване от мобилниустройства към базови станции
1805,200-1815,000MHz – Предаване от базови станциикъм мобилни устройства
Модулация: GMSK, 8PSK;
200kHz ширина на честотен канал;
FDD – дуплексно отстояние 95MHz
TDMA – метод за достъп.

UMTS:
1920-1930MHz – Предаване от мобилни устройства къмбазови станции
2110-2120MHz – Предаване от базови станции къммобилни устройства
Модулация: QPSK, 16QAM, 64QAM;
5000kHz ширина на честотен канал;
FDD – дуплексно отстояние 190MHz;
CDMA – метод за достъп.

895,800-905,000MHz –Предаване от мобилниустройства към базови станции;
940,800-950,000MHz – Предаване от базови станциикъм мобилни устройства;
Модулация: QPSK, 16QAM, 64QAM;
5000kHz ширина на честотен канал;
FDD – дуплексно отстояние 45MHz;
CDMA – метод за достъп.

LTE:
1710,200-1720,000MHz – Предаване от мобилниустройства към базови станции
1805,200-1815,000MHz – Предаване от базови станциикъм мобилни устройства
Модулация: QPSK, 16QAM, 64QAM;
5000kHz ширина на честотен канал;
FDD – дуплексно отстояние 95MHz;
OFDMA, SC-FDMA – метод за достъп.

PVK

I am thinking of flashing the last firmware again, just in case, can you give me step by step instructions to do so?