[Q] Htc explorer pico Limited service problem - Android Q&A, Help & Troubleshooting

I bought this HTC explorer pico about 50 days ago, it worked totally fine . I rooted it added a custom ROM, still worked perfectly .
About two weeks ago i suddenly got a " No signal , Limited service error " . I thought the service might be down so i let it stay for a few hours.
The problem persisted and its been two weeks since i got any signals .
Things i did to figure out what was wrong:
1. Used the SIM from my HTC explorer and tested it on my bro's Nokia c7 , i got full signals and everything.
2. Used another SIM ( which was working perfectly on my bro's Nokia c7) on my HTC explorer and still got the same error of no signal limited service .
3. Searched around the web , found similar problems but nothing that could solve my problem ( some were solved by changing the sim , some were solved via contacting the service provider <- did all these but still the problem exists ).
I'd really appreciate it if anyone here could help me out.
If unfortunately there isn't any solution and if it is a hardware problem , could anyone help me out in restoring the phone to the stock ROM and locking the boot loader.
( I found a tutorial here http://forum.xda-developers.com/showthread.php?t=1500165 , but as i am new to android , i couldn't understand anything. )
Thanks.
Regards,
Ace.

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Have you tried connecting via your computer ( internet pass through ).
Sent from my HTC Explorer A310e using XDA

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I didnt before your post , so i did it after your reply.
The internet on the phone is working correctly.
But i didn't get how this would help in perhaps an issue that is related to cellular network signals not an internet/wifi issue?

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try to reflash stock rom (u can lost root) or custom rom. U could deleted sth important.

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Noobie
Thanks for the reply ch3mn3y , but as i stated in my first post i am a noobie. So i didnt exactly understand your post.
I reflashed the only available custom rom available for Htc explorer. Then i flashed stock rom using the recovery menu and update by .zip file option.
But the problem still exists.
Regards,
Ace.

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I mean that u should install again clean stock rom (eg from here www.tsar3000.com/Joomla/index.php?o...riginal-roms&catid=65:htc-downloads&Itemid=98) and than do factory reset.
If u still have a problem i think that it can be hardware problem (?) not soft
I would be more helpful with xperia's couse its the only phone i had
Sent using r800i with DoomKernel v14 (1.21ghz)

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ch3mn3y said:
I mean that u should install again clean stock rom (eg from here www.tsar3000.com/Joomla/index.php?o...riginal-roms&catid=65:htc-downloads&Itemid=98)
Click to expand...
Click to collapse
I have installed a clean rom.
ch3mn3y said:
and than do factory reset.
Click to expand...
Click to collapse
Havnt tried the factory reset yet, will try this now. nope nothing
ch3mn3y said:
If u still have a problem i think that it can be hardware problem (?) not soft
Click to expand...
Click to collapse
Thats why i asked in my initial post regarding locking the boot etc for the warranty claim.
ch3mn3y said:
I would be more helpful with xperia's couse its the only phone i had
Click to expand...
Click to collapse
I wish i had an experia too

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There is no way to relock the bootloader without HTC knowing it was unlocked and relocked. You can relock it, but it will be obvious to HTC that it was at one point unlocked.
Note that on their bootloader unlocking site it says that unlocking the bootloader may void some or all of your warranty. I haven't (thankfully) had experience with HTC's warranty policies, but by my reading, that means you may still be covered by warranty. My initial assumption would be that perhaps the warranty will still cover hardware defects, provided they are not caused by unlocking bootloader, or what you do with unlocked bootloader (i.e. custom ROMs etc.). But as I said, I haven't had experience. You could try and contact HTC on the matter.

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I am trying to exhaust every possibility before i can send for the warranty claim because i have international warranty and no local warranty.

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Come on guys i need help here at-least point me to a tutorial to restoring the phone to the stock ROM and locking the boot loader. Id really appreciate it .
Thanks.

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aceonline said:
I bought this HTC explorer pico about 50 days ago, it worked totally fine . I rooted it added a custom ROM, still worked perfectly .
About two weeks ago i suddenly got a " No signal , Limited service error " . I thought the service might be down so i let it stay for a few hours.
The problem persisted and its been two weeks since i got any signals .
Things i did to figure out what was wrong:
1. Used the SIM from my HTC explorer and tested it on my bro's Nokia c7 , i got full signals and everything.
2. Used another SIM ( which was working perfectly on my bro's Nokia c7) on my HTC explorer and still got the same error of no signal limited service .
3. Searched around the web , found similar problems but nothing that could solve my problem ( some were solved by changing the sim , some were solved via contacting the service provider <- did all these but still the problem exists ).
I'd really appreciate it if anyone here could help me out.
If unfortunately there isn't any solution and if it is a hardware problem , could anyone help me out in restoring the phone to the stock ROM and locking the boot loader.
( I found a tutorial here http://forum.xda-developers.com/showthread.php?t=1500165 , but as i am new to android , i couldn't understand anything. )
Thanks.
Regards,
Ace.
Click to expand...
Click to collapse
Have you downloaded the stock ruu that the specified thread mentioned?
aceonline said:
Come on guys i need help here at-least point me to a tutorial to restoring the phone to the stock ROM and locking the boot loader. Id really appreciate it .
Thanks.
Click to expand...
Click to collapse
From a HTC Explorer A310e using XDA.
Sent from a person who likes people pressing the thanks button.

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Someone else posted something about stock ruu.:thumbup:
prateek.maac said:
Warning dont flash any other rom before this step in order to retain factory status you have to maintain the default rom on which rooting was done
for those who want to revert to stock from jaggy or any other make a clockwork backup of your stock rom even if it is rooted
Step 1 : if you have messed up in previous posts by our friend dont be alarmed
make sure you have clockwork mod of your original rom backed up in sd card or in the computer copied from sd card
to do this go to the recovery option choose backup and restore in this select restore and select the backup you did with your stock rom
Step 2 : download these files ( also noted in my system the android sdk was in c drive root as c:\Android else make a fresh installation of the android sdk ) GIVEN BELOW AT THE END OF POST
Step 3 : on c drive paste these files in c:\Android ( if file not there in pc install sdk in this folder ) now open cmd from start menu
Step 4 : Execute commands
cd c:\Android
fastboot flash boot boot_signed.img
fastboot flash recovery recovery_signed.img
(fastbooting system .img mentioned in previous post is not required as it will conflict with the hboot and it too tiresome to get the sock back)
Final step : now with the stock boot and recovery of htc default signed just restart your cell phone and got to settings > storage >factory reset
Ta da your phone is unrooted now for the grand finale lock the HBOOT
execute command : fastboot oem lock
to lock the boot loader
now it will show relocked now at this stage if you got your factory default ruu matched with the software version of your phone in my case it was
V1.31.728.1
then flash that ruu and vola your phone is crystal clear no hboot relocked or no rooting ever shown.
From a HTC Explorer A310e using XDA.
Sent from a person who likes people pressing the thanks button.
Click to expand...
Click to collapse

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ri123 said:
Someone else posted something about stock ruu.:thumbup:
prateek.maac said:
Warning dont flash any other rom before this step in order to retain factory status you have to maintain the default rom on which rooting was done
for those who want to revert to stock from jaggy or any other make a clockwork backup of your stock rom even if it is rooted
Step 1 : if you have messed up in previous posts by our friend dont be alarmed
make sure you have clockwork mod of your original rom backed up in sd card or in the computer copied from sd card
to do this go to the recovery option choose backup and restore in this select restore and select the backup you did with your stock rom
Step 2 : download these files ( also noted in my system the android sdk was in c drive root as c:\Android else make a fresh installation of the android sdk ) GIVEN BELOW AT THE END OF POST
Step 3 : on c drive paste these files in c:\Android ( if file not there in pc install sdk in this folder ) now open cmd from start menu
Step 4 : Execute commands
cd c:\Android
fastboot flash boot boot_signed.img
fastboot flash recovery recovery_signed.img
(fastbooting system .img mentioned in previous post is not required as it will conflict with the hboot and it too tiresome to get the sock back)
Final step : now with the stock boot and recovery of htc default signed just restart your cell phone and got to settings > storage >factory reset
Ta da your phone is unrooted now for the grand finale lock the HBOOT
execute command : fastboot oem lock
to lock the boot loader
now it will show relocked now at this stage if you got your factory default ruu matched with the software version of your phone in my case it was
V1.31.728.1
then flash that ruu and vola your phone is crystal clear no hboot relocked or no rooting ever shown.
From a HTC Explorer A310e using XDA.
Sent from a person who likes people pressing the thanks button.
Click to expand...
Click to collapse
As you have installed a stock Rom you have completed a few of these steps
From a HTC Explorer A310e using XDA.
Sent from a person who likes people pressing the thanks button.
Click to expand...
Click to collapse

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aceonline said:
I didnt before your post , so i did it after your reply.
The internet on the phone is working correctly.
But i didn't get how this would help in perhaps an issue that is related to cellular network signals not an internet/wifi issue?
Click to expand...
Click to collapse
Sorry I misread your post.
From a HTC Explorer A310e using XDA.
Sent from a person who likes people pressing the thanks button.

---

ri123 said:
Someone else posted something about stock ruu.:thumbup:
prateek.maac said:
Warning dont flash any other rom before this step in order to retain factory status you have to maintain the default rom on which rooting was done
for those who want to revert to stock from jaggy or any other make a clockwork backup of your stock rom even if it is rooted
Step 1 : if you have messed up in previous posts by our friend dont be alarmed
make sure you have clockwork mod of your original rom backed up in sd card or in the computer copied from sd card
to do this go to the recovery option choose backup and restore in this select restore and select the backup you did with your stock rom
Step 2 : download these files ( also noted in my system the android sdk was in c drive root as c:\Android else make a fresh installation of the android sdk ) GIVEN BELOW AT THE END OF POST
Step 3 : on c drive paste these files in c:\Android ( if file not there in pc install sdk in this folder ) now open cmd from start menu
Step 4 : Execute commands
cd c:\Android
fastboot flash boot boot_signed.img
fastboot flash recovery recovery_signed.img
(fastbooting system .img mentioned in previous post is not required as it will conflict with the hboot and it too tiresome to get the sock back)
Final step : now with the stock boot and recovery of htc default signed just restart your cell phone and got to settings > storage >factory reset
Ta da your phone is unrooted now for the grand finale lock the HBOOT
execute command : fastboot oem lock
to lock the boot loader
now it will show relocked now at this stage if you got your factory default ruu matched with the software version of your phone in my case it was
V1.31.728.1
then flash that ruu and vola your phone is crystal clear no hboot relocked or no rooting ever shown.
From a HTC Explorer A310e using XDA.
Sent from a person who likes people pressing the thanks button.
Click to expand...
Click to collapse
Careful there is talk of bricking if the bootloader is locked at the wrong time.
From a HTC Explorer A310e using XDA.
Sent from a person who likes people pressing the thanks button.
Click to expand...
Click to collapse

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not work still show relocked.

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i had this problem this is how i fixed in ROOTED HTC EXPLORER/PICo
goto settings > mobile networks > network operators > search networks > select ur network
this happened to me because i had turned off automatic network search ...

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farazi482 said:
i had this problem this is how i fixed in ROOTED HTC EXPLORER/PICo
goto settings > mobile networks > network operators > search networks > select ur network
this happened to me because i had turned off automatic network search ...
Click to expand...
Click to collapse
Then solving this problem may be possible through factory reset
Sent from my HTC Explorer A310e

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Solved this problem
I accidently solved the problem, but don't know the reason. Let me tell you the scenario:-
1. Using CM11-Kitkat_4.4.4 (no signal since 1-2 months, got signal sometimes for 20 sec-that too not more then once a day, tried maximum ROMs including stock, and all available methods on various sites)
2. Attached Phone to computer as "Mass Storage"
3. Via MiniTool Partition Magic:
a) resize the first FAT32(main sdcard) partition to make space
b) move (sd-ext) second EXT3 partition to shift free space at right side(sdcard & sd-ext will be together then)
c) deleted last(3rd) swap partition [as all these 3 partition are automatically created-if you partition sdcard by cmmRecovery OR aw3som3Recovery]
d) created a new partition(3rd at last position) by all available space (by resizing-1st, moving-2nd, deleteing-3rd) AS EXT4, labeled SD-DATA
e) Apply. (phone automatically restarted-but stuck at boot animation; I removed the battery and restart-all working with signal). I also check partition, I fount that CM11-ROM using the 3rd partition also(7% used). That's weird coz in CM11 doc I didn't found anywhere to create 3rd partition; I created it coz in CM12-LolipopROM it was mentioned.
**) Now partition order = SDCARD [FAT32 all remaining size of memory card], SD-EXT [EXT3 approx.. 900MB], SD-DATA [EXT4 approx. 1GB]
**) As per my knowledge, I think 2nd/3rd partition can be EXT2/3/4 (just a guess)
4. Now signal are working after restart since 12 hrs. And [also] [still] after flashing CM12-LolipopRom
5. NOTE: Its not working if I set location setting to "High Accuracy" SET IT TO [Device Only].
May be it help to someone.
Thanks,
Adarsh Rajput
IT-Consultant.