[need help] WT19i reboots when switching to 2G/GSM network - Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A

I'm currently facing a problem with my WT19i, it reboots when it's connecting to 2G network. It happens when i set it to auto 2G/3G mode and it lost 3G signal then trying to connect to 2G, or i set it to 2G only. I've tried stock rom and kernel, several custom roms and kernels as well as reflashing baseband, but can't solve the problem. SIM card is working fine on 2G mode on my ST27i. There's a similar thread but with no solution.
Any help is appreciated. Thanks.

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I've spend 2 days and already bricked the phone and restored it via the testpoint method, flashed cwm and rooted. But since the beginning i have a problem with the 3g. When i go to the engineering mode and i try to change to wcdma in the rat options it simply change back to gsm only.
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I wonder if anyone with this phone or an mtk6577 has experienced this problem before?
PS: i have 3g network in the area and i have 3g with the same sim card on another phone.
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[Q] Xperia X10 Mini (E10i) GSM Network connection failure (unable to make calls/sms)

Hi everyone,
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help. strange data connectivity problem(hsdpa)

hi all,
I have this strange data connectivity issue, I am on a network(bsnl/mtnl, mumbai) and it supports hsdpa at 2100mhz band and our s2 supports that. now the problem is I am unable to connect to hsdpa network(data) signal comes fine no issues there. but with the same sim if I use my frnd's xperia go I am able to get data connection just fine. moreover if I move out of my area then I am able to connect on s2 also. I dont know what the problem is.
I am on jellysnap rom. xxms4 modem and xxms1 base.
amit.mastermind90 said:
hi all,
I have this strange data connectivity issue, I am on a network(bsnl/mtnl, mumbai) and it supports hsdpa at 2100mhz band and our s2 supports that. now the problem is I am unable to connect to hsdpa network(data) signal comes fine no issues there. but with the same sim if I use my frnd's xperia go I am able to get data connection just fine. moreover if I move out of my area then I am able to connect on s2 also. I dont know what the problem is.
I am on jellysnap rom. xxms4 modem and xxms1 base.
Click to expand...
Click to collapse
did you try to change the modem? or you can check this with other rom whether it is working there or not.
amit.mastermind90 said:
hi all,
I have this strange data connectivity issue, I am on a network(bsnl/mtnl, mumbai) and it supports hsdpa at 2100mhz band and our s2 supports that. now the problem is I am unable to connect to hsdpa network(data) signal comes fine no issues there. but with the same sim if I use my frnd's xperia go I am able to get data connection just fine. moreover if I move out of my area then I am able to connect on s2 also. I dont know what the problem is.
I am on jellysnap rom. xxms4 modem and xxms1 base.
Click to expand...
Click to collapse
you could try checking your apn settings, detection of apn are different on different roms.
or try forcing the network to use WCDMA mode (go to phone, then dial *#*#4636#*#*), go inside the first menu there and force it to use WCDMA (incase the rom toggles are misbehaving)
Twiq said:
you could try checking your apn settings, detection of apn are different on different roms.
or try forcing the network to use WCDMA mode (go to phone, then dial *#*#4636#*#*), go inside the first menu there and force it to use WCDMA (incase the rom toggles are misbehaving)
Click to expand...
Click to collapse
yes I tried that.. I have changed ROMs, changed modems... I am running out of options... !!! tried forcing wcdma mode too.. .
I think problem lies with hspa+ and HSDPA.... I
I will flash a stock ROM then we will see what happens... !!!
amit.mastermind90 said:
I will flash a stock ROM then we will see what happens... !!!
Click to expand...
Click to collapse
check your APN settings while your moving ROMs too. see if theres any different
Twiq said:
check your APN settings while your moving ROMs too. see if theres any different
Click to expand...
Click to collapse
no apns are right as i can connect to edge network just fine in evry rom.

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The only way I have been able to have my data connection working is by changing the network mode in the Hidden Menu from default "LTE 850 Preferred" to "GSM ALL", but this only gives me access to the slower 2G connection. All other options show 3G but the phone has no Internet connection.
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