Need to reset a used LG-K371 I factory reset it but it still wants me to enter the old owners google account information how do I fix that?

SOURCE: can i use a sim card from another phone in this?

Once a wireless company goes sim card, they never go back! Unfortunately, your old phone is worthless and they cannot attach any sort of IMEI to an account. Sorry!

SOURCE: Blackberry pearl having sim card issues

很遗憾呀，这个问题好像至今为止都没有一个合理的解释，我们中国的用户也对此恨困扰。还没有找到完全有效的方法能处理好。
基本的设置设置好之后仍行不同，通常的应急性的做法是这样的：
一：重新启动。
二：用块橡皮什么的擦掉sim卡的氧化物，然后找张纸片垫在卡上，这样能处理因为接触不良引起的状况。
三：换张卡。。。

SOURCE: LG Vu Sim Card problem

I've dealt with this issue ever since I bought this phone - and would rather throw it across the room and watch it burst into 1,000 pieces than have to see the error pop up again. All I did was cut out about 1-inch by1/4" inch strip from a postcard - or any heavy weight paper. In other words, not cardboard, but not copy paper. More like the weight of a vhs cover box, cereal box, etc. I inserted one end of the strip above the sim card and below the phone shell (over the part of the sim card that's not showing); and folded the rest of the paper strip (might have to tear some off) to be double ply above the part of the sim card that is showing. Put on the cover; you should have to press firmly to get it to fit on and smash the double-ply strip down. Make sure the double ply is only over the sim card, not any over the battery. This worked for me!

SOURCE: My LG KP500 phone can't read my sim card. But I

My LG Cookie doesnt read ANY SIM card Gonna throw it out D: It ****. Try move your sim card somewher

SOURCE: VX570 password reset. Just

press F2 and F4 at the same time them enter 1alpha alpha 66831 that should work if not them try BEARTIME (23378463 ) hope this help : - )