14

CyanogenMod - in a vanilla or official build - will not typically contain a bootloader. On many devices there is really no good way to even overwrite the bootloader because it is on protected memory (the bootloader is "locked") and cannot be overwritten. It installs a boot image and a system image (i.e. writes to the /boot and /system partitions). I've heard ...


12

Yes - all android devices will work without a SIM card, and can be connected to wifi for an internet connection. EDIT: Just so people know, there is a setting in the build.prop file that determines whether or the not the device can be used without a SIM or not. Most of the time this is set to allow it, however in rare cases it may be disallowed.


8

No, they're completely unrelated things. As you say, an unlocked device means it's not locked to a particular carrier: you can insert a different SIM card to change to a different carrier, and it will work. A locked device will not connect to another carrier if you change the SIM card. The bootloader is the first thing that runs when you turn the phone on: ...


5

Some Android devices, mostly older ones, and CDMA2000 devices, will attempt to let you not use them without activation. Usually the 'provision' application has a secret code that can bypass the 'mandatory' activation - e.g., on the Motorola Droid 2 Global it's upper left corner, upper right corner, lower right corner, lower left corner (the lower corners ...


4

No, CyanogenMOD and other custom ROMs rely on your device's bootloader. In general you don't want to mess with the bootloader since doing so is an easy way to brick your device. The bootloader doesn't really have anything to do with the SIM lock usually. I don't know of an Android-specific way to unlock this phone, which means you'll probably need to use ...


4

No, the bootloader has no bearing on a SIM/network lock. The HTCdev site explicitly states this on the bootloader unlock page, in fact: Please note that unlocking your bootloader does not mean that you will be able to unlock the SIM lock. Unlocking your SIM lock is at the discretion of your operator/carrier and is not part of the bootloader ...


4

If your SIM card is PIN locked, the network unlock code is useless. The network unlock code allows a phone that is restricted to a single carrier to be unlocked for use in other carrier's networks. The SIM PIN is a personal identification number that is used to unlock the SIM card in order to register it to the network. This means that the phone will not ...


3

If the SIM card works, and you can get a network signal, then the deice is unlocked and it is a different error that is stopping internet from working. It could be due to a number of reasons that internet isn't working, I am going to list them: Invalid/Wrong APN's APN (Access Point Names) allow your device to connect to mobile internet. You nust ensure ...


3

I have followed this guide and my phone is now unlocked. I wouldn't recommend it for a beginner user, because it involves pretty advanced commands and procedures, and uses ROMs and tools from untrusted sources. Proceed at your own risk! The performed steps were basically: Create a complete nandroid backup on the SD card. Google for a stock ROM for the ...


3

The phone specification says it supports the following frequencies: 2G Network GSM 850 / 900 / 1800 / 1900 3G Network HSDPA 850 / 900 / 1700 / 1900 / 2100 I think this is almost all the frequency, so the phone should work in India.


3

If you're talking about sim unlock, it is possible to re-lock it back to the network as was often the case with old nokia dumb-phones. However, I have not seen this in practice with most phones now-a-days. Usually, once it is unlocked from the network, any sim card can go in place and use it. However, if you're talking about locking the boot-loader - then ...


3

Unlocking a phone from network has nothing to do with manufacturer updates. Its more of, being able to take a SIM card from another network and pop it in. For example, buy a handset from Orange, and using a T-Mobile SIM card in the new Orange handset, the T-Mobile will not work as the handset is locked into the Orange network and thusly refuse any other ...


3

If you have an unlocked phone, I don't think there should be any problem. The SIM card for GoPhone is apparently just a regular prepaid SIM card and is not tied to the phone it is sold with. If the phone doesn't recognize the APN for 3G, just go to Settings > Wireless and Networks > Mobile Networks > Access point Names and enter the appropriate ...


3

Generally speaking, rooting is completely unrelated to unlocking. CDMA unlocking is also more difficult than SIM unlocking a GSM phone, and CDMA phones need to be activated on the network, unlike sticking a SIM in an unlocked GSM phone and doing whatever you want. You'll need help from both carriers (Verizon to unlock, your carrier to activate) in order to ...


3

You should call your carrier in the UK and explain that you need to unlock your phone because you are travelling. Unless they're being particularly unhelpful a carrier will normally give you the unlock code for that purpose. Edit: It looks like the unlock code may be stored on the device and accessible as with many Galaxy phones, most easily if you are ...


3

adb sideload does not transfer the file to the sdcard permanently. To sideload correctly, you need to pick that option from the recovery first and then when the phone is waiting for the sideload type, adb sideload <PACKAGE> If you want to push the file to the phone's sdcard, you could try, adb push <PACKAGE> /sdcard/ That should copy the file ...


3

You don't use adb to connect to a device when it's in the bootloader menu: you need to use the fastboot command instead. That's why it's called "fastboot mode"! Not all phones support fastboot: in particular, older HTC phones use a proprietary protocol called HBOOT instead, but I think the newer ones support fastboot.


3

Note: This is a workaround. Some users have posted about the bug (saying this bug is present from long time) in reddit and oneplus forums. Since it is a bug, there is no definitive solution to this. One possible work around is to simply turn off the screen by pressing  lock button and turn back on by pressing  lock button  again, and ...


3

Carrier locks work at SoC/bootloader level. In simple terms the modem - which has its own Baseband Processor - is tuned to certain frequencies / bands or programmed to register with only one MCC/MNC which identifies a universally unique carrier. MCC/MNC is part of IMSI which is stored on SIM card and used in initial authentication process when device goes ...


3

Such unlock apps aren't official. They employ various methods of unlocking based on the information they gather from the app installed and querying from supposedly authentic database of unlock codes. I have personally used an unlock service for an iPhone which was locked to a carrier. I needed to supply device information and within a few hours they ...


2

I have an HTC Sensation 4G that originally was purchased from T-mobile. I unlocked it using the code provided by T-mobile (free) and used it on AT&T. I just did a factory settings reset as instructed in the user manual and it still works fine and is still unlocked.


2

The Galaxy S2 has an unlocked bootloader, which means you can install any rom on it, rooting is not mandatory, some roms have root privileges, some don't.


2

According to the FastGSM page: "Congratulations! Your phone is permanently unlocked and can use it with different network SIM card. It will never relock again even if you do software update." (source) This means that even a factory reset won't relock the phone. I assume this is because Samsung phones use the /efs partition to store the IMEI and other ...


2

According to AndroidCentral and these XDA posts, the Photon 4G is specifically made to prevent access to AT&T or T-Mobile and an unlock code won't do anything. Presumably so that if you are in the US and don't need to roam away from Sprint, you can't switch away from Sprint. The limitation doesn't appear to have been hacked around yet.


2

The device may have to be unlocked first. Rooting will not Unlock the device. You will also need information from the network you want to run the device on. Like if the device is supported on their network, if they are able to active the device (they will be able to tell you if they support it if you give them the ESN/MEID) and what their mobile carrier code ...


2

AT&T's 3G works in the 1900 MHz and 850 MHz frequencies. Even though HTC Sensation XE is listed as supporting the 850 MHz frequency, it is only using it for slower 2G (EDGE) speeds. For 3G it's using T-Mobile's HSDPA bands 900/1700/2100 MHz. Unfortunately no amount of tweaking in the phone's software will make it work on AT&T's 3G bands, since ...


2

Yes, as with many of the Galaxy devices it appears that the unlock code is actually stored on the device and easily accessible (as long as you have root access). This XDA post should guide you through it. Note of course that it might not work and you could brick your device by rooting, in addition to voiding the warranty. In my experience the Galaxy ...


2

Depending on where you are in the world, and which carrier you're with, your phone will have a unique model. You can find your phone's model number by going to Settings > About device and it'll be around the middle of the page. North American models Carrier Name Model Identifier AT&T (US) SGH-I747 Bell Mobility (CAN) ...


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